List of coupled cousins

Notable commoners

John Adams

Abdullah ibn Abdul-Muttalib and his third cousin once removed, Aminah
John Adams and his third cousin, Abigail Smith^[1]
John Adams II and his first cousin, Mary Catherine Hellen.
Mary Louisa Adams, granddaughter of John Quincy Adams by his second son John Adams II, and her second cousin William Clarkson Johnson, a great-grandson of John Quincy Adams' father John Adams by his second son Charles Adams.
Mary Gardiner Adams, granddaughter of John Quincy Adams by his third son Charles Francis Adams Sr., and her distant cousin Henry Parker Quincy.
Ali and his first cousin once removed, Fatimah
Braulio Álvarez Castillo, Dominican Republic military man, and his double cousin, María Álvarez Guerra.^[2]
Mark Antony and his first cousin, Antonia Hybrida Minor, and later his fourth cousin once removed, Octavia the Younger.

Johann Sebastian Bach and his second cousin, Maria Barbara Bach^[3]
Ramón Báez Machado, Dominican Republic president, and his first cousin once removed, Natalia Soler Machado.^[4]
Josiah Bartlett, second signer of the United States Declaration of Independence, and his first cousin, Mary Bartlett^[5]
Christine Boutin and her first cousin, Louis Boutin.^[6]
Wernher von Braun and his first cousin, Maria Luise von Quistorp.^[7]
Charles Bulfinch and his first cousin, Hannah Apthorp ^[8]

John C. Calhoun, seventh Vice President of the United States, and his first cousin once removed, Floride Calhoun^[9]
Jeanne Calment, the oldest person whose age was verified by official documents, and her second cousin, Fernand Calment ^[10]
Benedict Swingate Calvert, third Proprietor Governor of Maryland and father of Eleanor Calvert, and his first cousin once removed Elizabeth Calvert
Charles Carroll of Carrollton, the only Roman Catholic signer of the United States Declaration of Independence, and his second cousin, Mary Darnall ^[11]

Charles Darwin and his first cousin, Emma Wedgwood.^[12] Their respective siblings Caroline Darwin and Josiah Wedgwood III also married. In addition, their grandparents, Sarah Wedgwood and Josiah Wedgwood, were third cousins.^[13]
Alfred I. du Pont, great-grandson of DuPont founder and his cousin-by-marriage, Bessie Gardner, as well as his second cousin, Alicia Bradford Maddox^[14]
Andrew Jackson Donelson and his first cousin, Emily Donelson.
Andrew Jackson Donelson and his first cousin, Elizabeth Martin Randolph.

Albert Einstein and his first cousin (through his mother) and second cousin (through his father), Elsa Löwenthal née Einstein^[15]
William Greenleaf Eliot, founder of Washington University in St. Louis (and grandfather of poet T. S. Eliot), married his first cousin once removed but more notable is that his father, mother, and wife were first cousins of each other.
William Ellery, signer of the Declaration of Independence, and his first cousin once removed, Abigail Cary^[16]
William Crowninshield Endicott, former US Secretary of War, and his first cousin, Ellen Peabody^[17]
John Wayles Eppes and his half-first cousin, Mary Jefferson
Ulises Espaillat, Dominican Republic president, and his first cousin, Eloísa Espaillat.^[18]

Vivian Fuchs, British explorer, and his cousin Joyce Connell.^[19]
Viriato Fiallo, Dominican Republic politician, and his first cousin, Prudencia Fiallo.^[20]
John F. Fitzgerald, former mayor of Boston and grandfather of John F. Kennedy, and his second cousin Mary Josephine Hannon.^[21]

Carlo Gambino, a mob boss, and his first cousin, Catherine Castellano^[22]
Buddha Gautama and 1st cousin, Yaśodhara
André Gide, Nobel Prize-winning French author, and his cousin, Madeleine Rondeaux.^[23]
Charlotte Perkins Gilman, American author, and her first cousin, George Houghton Gilman^[24]
Carl Giles, cartoonist, and his cousin, Joan Giles
Rudy Giuliani, mayor of New York, 1994–2001, and his second cousin once removed, Regina Peruggi^[25]
Laurent Gouvion, French general and later Marshal of the Empire, and his first cousin, Anne Gouvion.
Samuel L. Gouverneur and his first cousin, Maria Hester Monroe.
Duncan Grant, Scottish painter, who was in a relationship with his male cousin, the English writer Lytton Strachey.^[26]
Edvard Grieg, Norwegian composer, and his first cousin, Nina Hagerup^[27]

Monty Hall and his distant cousin Marilyn Plottel
Benjamin Harrison V, American revolutionary leader, and his second cousin, Elizabeth Bassett^[28]
Anna Tuthill Harrison, daughter of William Henry Harrison, and her first cousin once removed, William Henry Harrison Taylor.
Friedrich Hayek, Austrian-British economist, and his cousin Helene Bitterlich^[29]
Alexander Herzen, Russian writer and political activist, and his cousin, Natalya Zakharina.^[30]
Oliver Wendell Holmes, Sr., the poet, and his second cousin, Amelia Lee Jackson^[31]
Stephen Hopkins, signer of the Declaration of Independence, and his second cousin, Sarah Scott^[32]
Saddam Hussein and his first cousin Sajida Talfah

Isaac was married to his first cousin once removed, Rebecca (in Judeo-Christian mythology)

Jacob was married to two of his first cousins, sisters Leah and Rachel (in Judeo-Christian mythology)
Ja'far al-Sadiq and his first cousin, Fatima bint al-Hussain'l-Athram bin al-Hasan bin Ali.
Jesse James and his first cousin, Zerelda "Zee" Mimms ^[33]
Thomas Jefferson and his third cousin, Martha Wayles^[34]
Jón Sigurðsson, leader of the 19th-century Icelandic independence movement, and his first cousin, Ingibjörg Einarsdóttir.

Naoto Kan, former Prime Minister of Japan, and his first cousin, Nobuko^[35]
John Kerry, U.S. Secretary of State, was a distant cousin to his ex-wife Julia Thorne.
Arthur Henry King married his second cousin Patricia.^[36]
Nobusuke Kishi, former Japanese statesman, and his first cousin, Yoshiko Kishi^[37]

David Lean, British film director, and his first wife (first cousin, Isabel Lean).^[38]
Charles Lee and his second cousin, Anne Lee
Edmund Jennings Lee I and his second cousin, Sarah Lee
Charles Lilburn Lewis and his first cousin, Lucy Jefferson Lewis
Jerry Lee Lewis, rock and roll musician, and his first cousin once removed, Myra Gale Brown^[39]^[40]
Edward Philip Livingston and his third cousin, Elizabeth Stevens Livingston.
John Henry Livingston and his second cousin, Sarah Livingston.
Abbott Lawrence Lowell, president of Harvard University, and his distant cousin, Anna Parker Lowell^[41]

John A. Macdonald, first prime minister of Canada, and his first cousin, Isabella Clark^[42]
Rob Roy MacGregor married his cousin Mary Helen MacGregor of Comar in January 1693.
Gerardo Machado y Morales, fifth president of Cuba, and his first cousin, Elvira Machado Nodal^[43]
Maeda Toshiie, Japanese Daimyō in the 15th century, and his cousin, Matsu.
Thomas Malthus, British academic, and his first cousin once removed, Harriet Eckersall^[44]
Delarivier Manley, British playwright and political satirist, and her first cousin John Manley^[45]
Mao Zedong, founder of the People's Republic of China, and his second cousin Luo Yixiu^[46]
Francis Marion, American revolutionary leader also called the "Swamp Fox," and his first cousin, Mary Esther Videau^[47]
Abraham Maslow, father of humanistic psychology, and his first cousin, Bertha Goodman^[48]
Matthew Fontaine Maury married his first cousin, Ann Hull Herndon, sister of Captain William Lewis Herndon, who died on his ship SS Central America.
Hipólito Mejía, Dominican Republic president, and his third cousin, Rosa Gómez.^[49]
Darius Milhaud, French composer, and his first cousin, Madeleine Milhaud.^[50]
Christopher Robin Milne, son of author A. A. Milne and the Christopher Robin of the Winnie-the-Pooh books, and his first cousin Lesley Sélincourt.
Marina Mora, Peruvian beauty queen and former Miss Peru, and her first cousin Gustavo Mora.^[51]
Mōri Terumoto, Japanese Daimyo in late 15th and early 16th century, and his cousin (first wife), Minami no Kata.
Samuel Eliot Morison, historian, and his first cousin once removed, Agnes Priscilla Randolph Barton
Samuel F. B. Morse, inventor of the Morse code, and his first cousin once removed, Sarah Elizabeth Griswold, his second wife^[52]
Ignacy Mościcki, Polish chemist and president and his first cousin, Michalina Czyżewska
Muhammad and his first cousin, Zaynab bint Jahsh

Naoe Kanetsugu, Japanese samurai and Karō of the Uesugi clan in 15th and 16th century, and his cousin, Osen.

Ōtomo no Yakamochi, Japanese statesman and waka poet in the Nara period, and his cousin, Sakanoue no Ōiratsume.

Edgar Allan Poe and his first cousin, Virginia Clemm^[53]
Bolesław Prus, Polish novelist, and his cousin, Oktawia Trembińska.^[54]

Sergei Rachmaninoff, composer, and his cousin, Natalia Satina^[55]
Thomas Mann Randolph Jr. and his double third cousin, Martha Jefferson Randolph
Satyajit Ray, Indian film-maker, and his first cousin, Bijoya Ray^[56]
José Rizal, Philippine national hero who had a relationship with his second cousin Leonor Rivera.
Theodore Douglas Robinson and his sixth cousin Helen Rebecca Roosevelt.
Franklin D. Roosevelt, US president, and his fifth cousin once removed, Anna Eleanor Roosevelt^[57]
James Roosevelt I and his second cousin, Rebecca Brien Howland, and later his sixth cousin, Sara Delano
Philip Roosevelt and his second cousin Jean S. Roosevelt
Alphonse James de Rothschild and his first cousin once removed, Leonora de Rothschild.
Edmond James de Rothschild and his first cousin once removed, Adelheid von Rothschild
Ferdinand de Rothschild and his second cousin, Evelina de Rothschild.
James Nathan de Rothschild and his second cousin, Laura von Rothschild.
Lionel de Rothschild and his first cousin, Charlotte von Rothschild
Nathaniel de Rothschild and his first cousin, Charlotte de Rothschild
Salomon James de Rothschild and his first cousin once removed, Adèle von Rothschild.
Adolph Carl von Rothschild and his first cousin once removed, Julie von Rothschild
Albert Salomon Anselm von Rothschild and his second cousin, Bettina Caroline de Rothschild .
Anselm Salomon von Rothschild and his first cousin, Charlotte Nathan Rothschild.
Mayer Carl von Rothschild and his first cousin, Louise von Rothschild.
Wilhelm Carl von Rothschild and his first cousin once removed, Mathilde Hannah von Rothschild.
Hassan Rouhani, 7th president of Iran and his first cousin Sahebeh Rouhani née Arabi

Eisaku Sato, prime minister of Japan, and his cousin, Hiroko Sato^[58]
Greta Scacchi, actress of Presumed Innocent, and her first cousin, Carlo Mantegazza ^[59]
Lucius Scribonius Libo (consul 16) and his half-first cousin twice removed, Cornelia Pompeia.
Igor Stravinsky, composer, and his first cousin, Katerina Nossenko^[60]

Alphonso Taft and his fourth cousin twice removed, Louisa Maria "Louise" Torrey
Toyotomi Hideyori, Japanese Daimyō, a son of Toyotomi Hideyoshi, and his cousin, Senhime.^[61]

Uthman and his fourth cousin, Ruqayyah bint Muhammad

Fernando Valerio, Dominican Republic military leader, and his second cousin, Petronila Suriel.^[62]
Mario Vargas Llosa, Peruvian writer and 2010 Nobel Prize laureate, and his first cousin Patricia Llosa.^[63]
Martin Van Buren, US president, and his first cousin once removed, Hannah Hoes^[64]

Gordon Welchman, Bletchley Park mathematician-cryptologist, and his cousin, Elisabeth Huber (his third wife).^[65]
H. G. Wells, author, and his first cousin, Isabel Mary Wells (his first wife)^[66]
Zack Wheat, baseball player, and his second cousin, Daisy Forsman.^[67]
William Whipple, signer of the Declaration of Independence, and his first cousin, Catherine Moffatt^[68]
Dennis Wilson and his his first cousin once removed, Shawn Marie Love.

Royalty

Europe

The royal couples listed below are but a sampling of the innumerable marriages that have occurred between cousins, of varying degrees, from royal or noble houses. Such royal intermarriages have been common, as it has generally been deemed inappropriate for royals to marry commoners.

The constitutional interest that has attached to royals' marital status, and the fact that genealogical records for royal houses tend to be more readily available than those for commoners, make royals' bloodlines generally better known than those of commoners.

Emperor Franz Joseph I of Austria

Kaiser Wilhelm II

Tsar Nicholas II

Carol II

Person	Spouse	Married	Year	Relationship	Common ancestor(s)
Prince Adalbert of Bavaria	Countess Augusta von Seefried auf Buttenheim	12 June 1919	1919	Second cousins once removed	Ludwig I of Bavaria
Prince Adalbert of Prussia	Princess Adelaide of Saxe-Meiningen	3 August 1914	1914	Second cousins	Ernst I, Prince of Hohenlohe-Langenburg
Adolf, Duke of Holstein-Gottorp	Christine of Hesse	17 December 1564	1564	Second cousins once removed	Eric II, Duke of Pomerania
Adolf I, Prince of Schaumburg-Lippe	Princess Hermine of Waldeck and Pyrmont	25 October 1844	1844	First cousins	George I, Prince of Waldeck and Pyrmont
Adolf Frederick, King of Sweden	Louisa Ulrika of Prussia	29 August 1744	1744	Third cousins	George, Duke of Brunswick-Lüneburg
Duke Adolf Friedrich of Mecklenburg	Princess Viktoria Feodora of Reuss-Schleiz	24 April 1917	1917	Fourth cousins	Frederick II Eugene, Duke of Württemberg
Adolph, Landgrave of Hesse-Philippsthal-Barchfeld	Princess Louise of Saxe-Meiningen	18 October 1781	1781	First cousins once removed	Philip, Landgrave of Hesse-Philippsthal
Adolphe, Grand Duke of Luxembourg	Grand Duchess Elizabeth Mikhailovna of Russia (first wife)	31 January 1844	1844	Second cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Adolphe, Grand Duke of Luxembourg	Princess Adelheid-Marie of Anhalt-Dessau (second wife)	23 April 1851	1851	Fourth cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Prince Adolphus, Duke of Cambridge	Princess Augusta of Hesse-Kassel	1 June 1818	1818	Second cousins	George II of Great Britain
Adolphus Frederick II, Duke of Mecklenburg-Strelitz	Princess Maria of Mecklenburg-Güstrow	1684	1684	First cousins once removed	Johann VII, Duke of Mecklenburg
Adolphus Frederick III, Duke of Mecklenburg-Strelitz	Princess Dorothea of Schleswig-Holstein-Sonderburg-Plön	16 April 1709	1709	Third cousins	Adolf, Duke of Holstein-Gottorp
Adolphus Frederick V, Grand Duke of Mecklenburg-Strelitz	Princess Elisabeth of Anhalt	April 17, 1877	1877	Second cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Afonso, Prince of Portugal	Isabella of Aragon, Queen of Portugal	1490	1490	Second cousins	John, Constable of Portugal
Afonso II of Portugal	Urraca of Castile, Queen of Portugal	1206	1206	Second cousins once removed	Ramon Berenguer III, Count of Barcelona and Douce I, Countess of Provence
Afonso III of Portugal	Matilda II, Countess of Boulogne (first wife)	1239	1239	Third cousins once removed	Fulk, King of Jerusalem
Afonso III of Portugal	Beatrice of Castile (second wife)	1253	1253	First cousins twice removed	Alfonso VIII of Castile
Afonso IV of Portugal	Beatrice of Castile	12 September 1309	1309	Half-first cousins once removed	Alfonso X of Castile
Afonso V of Portugal	Isabel of Coimbra (first wife)	6 May 1447	1447	First cousins	John I of Portugal
Afonso V of Portugal	Joanna la Beltraneja (second wife)	10 May 1475	1475	First cousins once removed^[69]	Ferdinand I of Aragon
Afonso of Portugal, Lord of Portalegre	Violante Manuel	1287	1287	First cousins once removed	Ferdinand III of Castile
Agrippina the Elder	Germanicus	between 5 BC and 1 BC	-1	Second cousins	Gaius Octavius and Atia Balba Caesonia
Agrippina the Younger	Gnaeus Domitius Ahenobarbus	28	28	First cousins once removed	Mark Antony and Octavia the Younger
Prince Aimone, Duke of Apulia	Princess Olga, Duchess of Apulia	16 September 2008	2008	Second cousins (through Prince Jean, Duke of Guise); second cousins once removed (through George I of Greece)	Prince Jean, Duke of Guise; George I of Greece
Albert of Saxony	Carola of Vasa	18 June 1853	1853	Second cousins	Charles Louis, Hereditary Prince of Baden
Prince Albert of Saxe-Altenburg	Princess Marie of Prussia (first wife)	6 May 1885	1885	Second cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Prince Albert of Saxe-Altenburg	Duchess Helene of Mecklenburg-Strelitz (second wife)	13 December 1891	1891	Second cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Prince Albert of Prussia	Princess Marianne of the Netherlands	14 September 1830	1830	First cousins	Frederick William II of Prussia
Prince Albert of Prussia	Princess Marie of Saxe-Altenburg	9 April 1873	1873	Second cousins once removed	Frederick William II of Prussia
Albert, 8th Prince of Thurn and Taxis	Archduchess Margarethe Klementine of Austria	15 July 1890	1890	Fourth cousins	Charles Alexander, Duke of Württemberg
Albert I of Belgium	Elisabeth of Bavaria, Queen of Belgium	2 October 1900	1900	Third cousins (though Charles Louis, Hereditary Prince of Baden); Fourth cousins (through Charles III of Spain)	Charles Louis, Hereditary Prince of Baden; Charles III of Spain
Albert V, Duke of Bavaria	Archduchess Anna of Austria	July 4, 1546	1546	Second cousins once removed	Frederick III, Holy Roman Emperor
Albert VII, Archduke of Austria	Isabella Clara Eugenia	18 April 1599	1599	First cousins	Charles V, Holy Roman Emperor
Albert, Duke of Prussia	Dorothea of Denmark, Duchess of Prussia (first wife)	12 February 1526	1526	Second cousins once removed; third cousins	Frederick I, Elector of Brandenburg; Frederick I, Elector of Saxony
Albert, Duke of Prussia	Anna Marie of Brunswick-Lüneburg (second wife)	1550	1550	Half-first cousins twice removed	Albrecht III Achilles, Elector of Brandenburg
Albert Casimir, Duke of Teschen	Maria Christina, Duchess of Teschen	8 April 1766	1766	Second cousins	Leopold I, Holy Roman Emperor
Albrecht, Duke of Bavaria	Countess Maria Draskovich of Trakostjan	3 September 1930	1930	Fourth cousins once removed	Leopold II, Holy Roman Emperor
Albrecht, Duke of Württemberg	Archduchess Margarete Sophie of Austria	24 January 1893	1893	Half-second cousins once removed	Maximilian I Joseph of Bavaria
Alexander I of Scotland	Sybilla of Normandy	1107	1107	Sixth cousins	Hugh II, Count of Nordgau
Alexander I of Russia	Louise of Baden	28 September 1793	1793	Fourth cousins	Albert II, Margrave of Brandenburg-Ansbach
Alexander II of Russia	Marie of Hesse and by Rhine	16 April 1841	1841	Second cousins once removed	Louis IX, Landgrave of Hesse-Darmstadt
Alexander II of Scotland	Joan of England, Queen of Scotland (first wife)	21 June 1221	1221	Third cousins	Henry I of England
Alexander II of Scotland	Marie de Coucy (second wife)	15 May 1239	1239	Third cousins once removed	Hugh, Count of Vermandois
Alexander III of Scotland	Margaret of England (first wife)	26 December 1251	1251	Fourth cousins	Henry I of England
Alexander III of Scotland	Yolande of Dreux, Queen of Scotland (second wife)	15 October 1285	1285	Fourth cousins once removed	Robert I, Count of Dreux
Alexander III of Russia	Dagmar of Denmark	9 November 1866	1866	Half-fifth cousins	Adolphus Frederick II, Duke of Mecklenburg-Strelitz
Prince Alexander of Teck	Princess Alice of Albany	St George's Chapel, Windsor, 10 February 1904	1904	Second cousins once removed	George III of the United Kingdom
Alexander, Crown Prince of Yugoslavia	Princess Maria da Glória, Duchess of Segorbe	1 July 1972	1972	Fifth cousins once removed	Francis, Duke of Saxe-Coburg-Saalfeld
Alexander, Margrave of Meissen	Princess Gisela of Bavaria	3 April 1987	1987	Half-fourth cousins	Leopold II, Grand Duke of Tuscany
Duke Alexander of Württemberg	Princess Marie of Orléans	18 October 1837	1837	Fourth cousins	Louis Rudolph, Duke of Brunswick-Lüneburg
Alexander Farnese, Duke of Parma	Infanta Maria of Guimarães	November 11, 1565	1565	Second cousins once removed	Ferdinand II of Aragon and Isabella I of Castile
Alexander Karl, Duke of Anhalt-Bernburg	Princess Friederike of Schleswig-Holstein-Sonderburg-Glücksburg	30 October 1834	1834	Second cousins	Frederick II, Landgrave of Hesse-Kassel
Grand Duke Alexander Mikhailovich of Russia	Grand Duchess Xenia Alexandrovna of Russia	6 August 1894	1894	First cousins once removed	Nicholas I of Russia
Duke Alexander Petrovich of Oldenburg	Princess Eugenia Maximilianovna of Leuchtenberg	19 January 1868	1868	Second cousins	Paul I of Russia
Alexis, Landgrave of Hesse-Philippsthal-Barchfeld	Princess Louise of Prussia	27 June 1854	1854	Fifth cousins twice removed	Augustus the Younger, Duke of Brunswick-Lüneburg
Alexis, Prince of Bentheim and Steinfurt	Princess Pauline of Waldeck and Pyrmont	7 May 1881	1881	Fifth cousins thrice removed	Ernest I, Duke of Saxe-Gotha
Prince Alfons of Bavaria	Louise d'Orléans	15 April 1891	1891	Second cousins	Maximilian I Joseph of Bavaria
Alfonso the Battler	Urraca of León	1109	1109	Half-second cousins	Sancho III of Pamplona
Alfonso II d'Este, Duke of Ferrara	Archduchess Barbara of Austria (second wife)	5 December 1565	1565	Third cousins	Gaston IV, Count of Foix and Eleanor of Navarre
Alfonso II d'Este, Duke of Ferrara	Margherita Gonzaga, Duchess of Ferrara (third wife)	24 February 1579	1579	Third cousins once removed	Gaston IV, Count of Foix and Eleanor of Navarre
Alfonso IV of Aragon	Eleanor of Castile	5 February 1329	1329	First cousins once removed	Peter III of Aragon
Alfonso V of Aragon	Maria of Castile, Queen of Aragon	12 June 1415	1415	First cousins	John I of Castile
Alfonso VIII of Castile	Eleanor of England, Queen of Castile	17 September 1177	1177	Fourth cousins	Robert I, Duke of Burgundy
Alfonso IX of León	Theresa of Portugal, Queen of León (first wife)	15 February 1191	1191	First cousins	Afonso I of Portugal
Alfonso IX of León	Berengaria of Castile (second wife)	17 December 1197	1197	First cousins once removed	Alfonso VII of León
Alfonso X of Castile	Violant of Aragon	January 1249	1249	Third cousins	Alfonso VII of León
Alfonso XI of Castile	Constanza Manuel (first wife)	28 November 1325	1325	Second cousins once removed	Ferdinand III of Castile
Alfonso XI of Castile	Maria of Portugal (second wife)	1328	1328	Double first cousins	Sancho IV of Castile; Denis of Portugal
Alfonso XII of Spain	Mercedes of Orléans (first wife)	Atocha, Madrid, 23 January 1878	1878	First cousins	Ferdinand VII of Spain
Alfonso XII of Spain	Archduchess Maria Christina of Austria (second wife)	Basilica of Atocha, Madrid, 29 November 1879	1879	Third cousins	Charles III of Spain
Prince Alfonso, Count of Caserta	Princess Maria Antonietta of Bourbon-Two Sicilies	8 June 1868	1868	First cousins	Francis I of the Two Sicilies
Infante Alfonso, Duke of Calabria	Princess Alicia of Bourbon-Parma	16 April 1936	1936	Double second cousins	Ferdinand II of the Two Sicilies; Archduke Karl Ferdinand of Austria
Infante Alfonso Carlos, Duke of San Jaime	Infanta Maria das Neves of Portugal	26 April 1871	1871	First cousins once removed	John VI of Portugal
Alfred, Duke of Saxe-Coburg and Gotha	Grand Duchess Maria Alexandrovna of Russia	Winter Palace, St. Petersburg, 23 January 1874	1874	Third cousins once removed	Duke Charles Louis Frederick of Mecklenburg
Prince Alfred of Liechtenstein	Princess Henriette of Liechtenstein	26 April 1865	1865	First cousins	Johann I Joseph, Prince of Liechtenstein
Alois, Hereditary Prince of Liechtenstein	Duchess Sophie in Bavaria	St. Florin's, Vaduz, 3 July 1993	1993	Fifth cousins once removed	Maximilian I Joseph of Bavaria
Alois-Konstantin, 9th Prince of Löwenstein-Wertheim-Rosenberg	Princess Anastasia of Prussia	8 October 1965	1965	Fourth cousins once removed	Karl Ludwig, Prince of Hohenlohe-Langenburg
Prince Amedeo, Duke of Aosta	Princess Anne of Orléans	5 November 1927	1927	First cousins	Prince Philippe, Count of Paris
Prince Amedeo, Duke of Aosta	Princess Claude of Orléans	22 July 1964	1964	Second cousins	Prince Philippe, Count of Paris
Prince Amedeo of Belgium, Archduke of Austria-Este	Nob. Elisabetta Maria Rosboch von Wolkenstein	5 July 2014	2014	Distant cousins	Giuseppe Tiberio Ruffo, Count of Sinopoli; Franz Albrecht I, Prince of Oettingen-Spielberg
Amadeus VIII, Duke of Savoy	Mary of Burgundy, Duchess of Savoy	30 October 1393	1393	First cousins once removed	John II of France
Amadeus IX, Duke of Savoy	Yolande of Valois	1452	1452	Third cousins	John II of France
Andreas, Prince of Leiningen	Princess Alexandra of Hanover	5 October 1981	1981	Double fourth cousins	Queen Victoria; Joseph, Duke of Saxe-Altenburg
Prince Andrew of Greece and Denmark	Princess Alice of Battenberg	6 October 1903	1903	Fourth cousins	Frederick William II of Prussia
Prince Andrew of Yugoslavia	Princess Christina Margarethe of Hesse (first wife)	2 August 1956	1956	Third cousins; third cousins once removed	Queen Victoria
Prince Andrew of Yugoslavia	Princess Kira of Leiningen (second wife)	18 September 1963	1963	Second cousins	Alfred, Duke of Saxe-Coburg and Gotha
Anne, Queen of Great Britain	Prince George of Denmark	28 July 1683	1683	Second cousins once removed	Frederick II of Denmark
Anne of York, Duchess of Exeter	Henry Holland, 3rd Duke of Exeter	30 July 1447	1447	Half-second cousins	John of Gaunt
Anthony of Saxony	Princess Maria Carolina of Savoy (first wife)	29 September 1781	1781	Fourth cousins	Victor Amadeus I, Duke of Savoy
Anthony of Saxony	Maria Theresa of Austria (second wife)	8 September 1787	1787	First cousins once removed	Augustus III of Poland
Duke Anthony Ulrich of Brunswick	Grand Duchess Anna Leopoldovna of Russia	3 July 1739	1739	Third cousins once removed	Johann VII, Duke of Mecklenburg
Antoine, Duke of Lorraine	Renée of Bourbon	26 June 1515	1515	Third cousins	John I, Duke of Bourbon
Antoine, Duke of Montpensier	Infanta Luisa Fernanda, Duchess of Montpensier	10 October 1846	1846	First cousins once removed	Ferdinand I of the Two Sicilies
Prince Antoine of Bourbon-Two Sicilies	Duchess Elisabeth of Württemberg	8 July 1958	1958	First cousins once removed	Prince Alfonso, Count of Caserta
Archduke Anton of Austria	Princess Ileana of Romania	26 July 1931	1931	Fourth cousins	John VI of Portugal
Anton-Günther, Duke of Oldenburg	Princess Ameli of Löwenstein-Wertheim-Freudenberg	7 August 1951	1951	Fifth cousins once removed	Frederick II, Landgrave of Hesse-Kassel
Anton Ulrich, Duke of Saxe-Meiningen	Princess Charlotte Amalie of Hesse-Philippsthal	26 September 1750	1750	Second cousins twice removed	Johann II, Duke of Saxe-Weimar
Infante Antonio, Duke of Galliera	Infanta Eulalia of Spain	6 March 1886	1886	First cousins	Ferdinand VII of Spain
Prince Antônio of Orléans-Braganza	Princess Christine de Ligne	25 September 1981	1981	Fourth cousins once removed	John VI of Portugal
Antonio Farnese, Duke of Parma	Enrichetta d'Este	5 February 1728	1728	First cousins	Francesco I d'Este, Duke of Modena
Infante Antonio Pascual of Spain	Infanta María Amalia of Spain	25 August 1795	1795	First cousins once removed^[70]	Philip V of Spain
Prince Aribert of Anhalt	Princess Marie Louise of Schleswig-Holstein	6 July 1891	1891	Fourth cousins	Duke Charles Louis Frederick of Mecklenburg
Arthur II, Duke of Brittany	Marie, Viscountess of Limoges (first wife)	1275	1275	Third cousins	Robert II, Count of Dreux
Arthur II, Duke of Brittany	Yolande of Dreux, Queen of Scotland (second wife)	May 1294	1294	Third cousins	Robert II, Count of Dreux
Arthur, Prince of Wales	Catherine of Aragon	14 November 1501	1501	Third cousins once removed (through John of Gaunt, 1st Duke of Lancaster); Double fourth cousins (through Peter of Castile)	John of Gaunt, 1st Duke of Lancaster; Peter of Castile
Prince Arthur, Duke of Connaught and Strathearn	Princess Louise Margaret of Prussia	St. George's Chapel, Windsor Castle, 13 March 1879	1879	Third cousins once removed	Duke Charles Louis Frederick of Mecklenburg
Prince Arthur of Connaught	Princess Alexandra, Duchess of Fife	Chapel Royal, St. James's Palace, 15 October 1913	1913	First cousins once removed	Queen Victoria
Prince August, Duke of Dalarna	Princess Therese of Saxe-Altenburg	16 April 1864	1864	Third cousins	Prince George William of Hesse-Darmstadt
Prince August of Saxe-Coburg and Gotha	Princess Clémentine of Orléans	20 April 1843	1843	Fourth cousins	Louis Rudolph, Duke of Brunswick-Lüneburg
Prince August Leopold of Saxe-Coburg and Gotha	Archduchess Karoline Marie of Austria	30 May 1894	1894	Second cousins	Francis I of the Two Sicilies
Prince August Wilhelm of Prussia	Princess Alexandra Victoria of Schleswig-Holstein-Sonderburg-Glücksburg	22 October 1908	1908	First cousins	Frederick VIII, Duke of Schleswig-Holstein
Augustus, Duke of Saxe-Gotha-Altenburg	Duchess Louise Charlotte of Mecklenburg-Schwerin (first wife)	21 October 1797	1797	Second cousins	Frederick II, Duke of Saxe-Gotha-Altenburg
Augustus, Duke of Saxe-Gotha-Altenburg	Princess Karoline Amalie of Hesse-Kassel (second wife)	24 April 1802	1802	Fourth cousins	John George I, Duke of Saxe-Eisenach
Augustus, Grand Duke of Oldenburg	Princess Adelheid of Anhalt-Bernburg-Schaumburg-Hoym (first wife)	24 July 1817	1817	Fourth cousins	George I of Great Britain
Augustus, Grand Duke of Oldenburg	Princess Ida of Anhalt-Bernburg-Schaumburg-Hoym (second wife)	24 June 1825	1825	Fourth cousins	George I of Great Britain
Augustus, Grand Duke of Oldenburg	Princess Cecilia of Sweden (third wife)	5 May 1831	1831	Second cousins once removed	Christian August of Holstein-Gottorp, Prince of Eutin
Augustus, Elector of Saxony	Anne of Denmark, Electress of Saxony	7 October 1548	1548	Second cousins once removed	Eric II, Duke of Pomerania
Augustus II the Strong	Christiane Eberhardine of Brandenburg-Bayreuth	20 January 1693	1693	Second cousins	Christian, Margrave of Brandenburg-Bayreuth
Augustus III of Poland	Maria Josepha of Austria	20 August 1719	1719	Second cousins once removed	George, Duke of Brunswick-Lüneburg
Prince Augustus Ferdinand of Prussia	Margravine Elisabeth Louise of Brandenburg-Schwedt	27 September 1755	1755	Second cousins^[70]	Frederick William, Elector of Brandenburg
Prince Augustus William of Prussia	Duchess Luise of Brunswick-Wolfenbüttel	6 January 1742	1742	Fourth cousins once removed	Ernest I, Duke of Brunswick-Lüneburg
Prince Axel of Denmark	Princess Margaretha of Sweden	22 May 1919	1919	First cousins once removed	Christian IX of Denmark
Prince Benedetto, Duke of Chablais	Maria Anna of Savoy, Duchess of Chablais	19 March 1775	1775	Second cousins once removed^[69]	Philippe I, Duke of Orléans
Bernhard II, Duke of Saxe-Meiningen	Princess Marie Frederica of Hesse-Kassel	23 March 1825	1825	Third cousins once removed	Louis Crato, Count of Nassau-Saarbrücken
Bernhard III, Duke of Saxe-Meiningen	Princess Charlotte of Prussia	18 February 1878	1878	Second cousins	Frederick William III of Prussia
Prince Bernhard of Saxe-Weimar-Eisenach	Princess Ida of Saxe-Meiningen	30 May 1816	1816	Fourth cousins once removed	William, Duke of Saxe-Weimar
Berthold, Margrave of Baden	Princess Theodora of Greece and Denmark	17 August 1931	1931	Second cousins	Christian IX of Denmark
Boris III of Bulgaria	Giovanna of Italy	25 October 1930	1930	Fourth cousins once removed	Francis I, Holy Roman Emperor and Maria Theresa
Caligula	Lollia Paulina	38	38	Second cousins once removed	Drusus Claudius Nero I
Prince Carl, Duke of Västergötland	Princess Ingeborg of Denmark	27 August 1897	1897	First cousins once removed	Oscar I of Sweden
Carl, Duke of Württemberg	Princess Diane of Orléans	21 July 1960	1960	Double fourth cousins	Louis Philippe I; Francis I of the Two Sicilies
Archduke Carl Christian of Austria	Princess Marie Astrid of Luxembourg	6 February 1982	1982	Second cousins	Robert I, Duke of Parma
Carol I of Romania	Elisabeth of Wied	15 November 1869	1869	Fourth cousins once removed	Louis VIII, Landgrave of Hesse-Darmstadt
Carol II of Romania	Princess Helen of Greece and Denmark	Metropolitan Cathedral of Athens, 10 March 1921	1921	Second cousins	Queen Victoria
Carlos I of Portugal	Amélie of Orléans	22 May 1886	1886	Third cousins once removed	Charles IV of Spain
Prince Carlos of Bourbon-Two Sicilies	Mercedes, Princess of Asturias (first wife)	4 February 1901	1901	Second cousins	Archduke Charles, Duke of Teschen
Prince Carlos of Bourbon-Two Sicilies	Princess Louise of Orléans (second wife)	16 November 1907	1907	Double third cousins	Ferdinand I of the Two Sicilies; Charles IV of Spain
Carlos, Duke of Madrid	Princess Margherita of Bourbon-Parma	4 February 1867	1867	Second cousins once removed	Charles IV of Spain
Infante Carlos, Count of Molina	Infanta Maria Francisca of Portugal (first wife)	22 September 1816	1816	Second cousins once removed^[70]	Philip V of Spain
Infante Carlos, Count of Molina	Maria Teresa, Princess of Beira (second wife)	20 October 1838	1838	Second cousins once removed^[70]	Philip V of Spain
Infante Carlos, Count of Montemolin	Princess Maria Carolina of Bourbon-Two Sicilies	10 July 1850	1850	First cousins	Charles IV of Spain
Infante Carlos, Duke of Calabria	Princess Anne of Orléans	2 May 1965	1965	Fourth cousins	Ferdinand VII of Spain
Casimir, Margrave of Brandenburg-Bayreuth	Susanna of Bavaria	25 August 1518	1518	Second cousins once removed	Ernest, Duke of Austria
Catherine the Great	Peter III of Russia	21 August 1745	1745	Second cousins	Christian Albert, Duke of Holstein-Gottorp
Grand Duchess Catherine Mikhailovna of Russia	Duke Georg August of Mecklenburg-Strelitz	16 February 1851	1851	First cousins twice removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Grand Duchess Catherine Pavlovna of Russia	Duke George of Oldenburg (first husband)	3 August 1809	1809	First cousins	Frederick II Eugene, Duke of Württemberg
Grand Duchess Catherine Pavlovna of Russia	William I of Württemberg (second husband)	Saint Petersburg, 24 January 1816	1816	First cousins	Frederick II Eugene, Duke of Württemberg
Princess Cécile Marita Dorothea of Hohenlohe-Langenburg (daughter of Kraft, Prince of Hohenlohe-Langenburg	Count Cyril Amédée de Commarque	6 June 1998	1998	Fifth cousins	Louis, Duke of Württemberg
Charles the Bold, Duke of Burgundy	Catherine of France (first wife)	19 May 1440	1440	Third cousins	John II of France
Charles the Bold, Duke of Burgundy	Isabella of Bourbon (second wife)	Lille, 30 October 1454	1454	First cousins	John the Fearless, Duke of Burgundy
Charles the Bold, Duke of Burgundy	Margaret of York (third wife)	Damme, 3 July 1468	1468	Third cousins	Edward III of England
Charles I of Austria	Princess Zita of Bourbon-Parma	Schwarzau Castle, 21 October 1911	1911	Second cousins twice removed; fourth cousins	John VI of Portugal; Charles IV of Spain
Charles I of England	Henrietta Maria of France	St Augustine's Abbey, Canterbury, Kent, 13 June 1625	1625	Third cousins once removed	Francis, Count of Vendôme
Charles I of Württemberg	Olga Nikolaevna of Russia	13 July 1846	1846	Second cousins	Frederick II Eugene, Duke of Württemberg
Charles II, Duke of Parma	Princess Maria Teresa of Savoy	Lucca, 5 September 1820	1820	Double second cousins	Philip, Duke of Parma; Francis I, Holy Roman Emperor and Maria Theresa of Austria
Charles II of England	Catherine of Braganza	Domus Dei, Portsmouth, Hampshire, 21 May 1662	1662	Fifth cousins; seventh cousins once removed	Isabella I of Castile; Ferdinand I of Aragon
Charles II of Spain	Marie Louise of Orléans (first wife)	19 November 1679	1679	First cousins once removed	Philip III of Spain
Charles II of Spain	Maria Anna of Neuburg (second wife)	28 August 1689	1689	Second cousins once removed	William V, Duke of Bavaria
Charles II, Elector Palatine	Princess Wilhelmine Ernestine of Denmark	20 September 1671	1671	Second cousins once removed	Frederick II of Denmark
Charles II, Archduke of Austria	Maria Anna of Bavaria	26 August 1571	1571	Third cousins^[70]	Frederick III, Holy Roman Emperor
Charles II, Duke of Mantua and Montferrat	Archduchess Isabella Clara of Austria	7 November 1649	1649	Second cousins twice removed	Ferdinand I, Holy Roman Emperor
Charles II, Grand Duke of Mecklenburg-Strelitz	Landgravine Friederike of Hesse-Darmstadt (first wife)	18 September 1768	1768	Third cousins once removed	Ernest I, Duke of Saxe-Gotha
Charles II, Grand Duke of Mecklenburg-Strelitz	Landgravine Charlotte of Hesse-Darmstadt (second wife)	28 September 1784	1784	Third cousins once removed	Ernest I, Duke of Saxe-Gotha
Charles III of Spain	Maria Amalia of Saxony	May 8, 1738	1738	Fourth cousins	Philip III of Spain
Charles III, Duke of Parma	Louise Marie Thérèse d'Artois	Schloss Frohsdorf, Austria, 10 November 1845	1845	Second cousins	Victor Amadeus III of Sardinia
Charles III William, Margrave of Baden-Durlach	Magdalena Wilhelmine of Württemberg	27 June 1697	1697	First cousins once removed	Frederick III, Duke of Holstein-Gottorp
Charles IV of Spain	Maria Luisa of Parma	La Granja Palace, 4 September 1765	1765	First cousins	Philip V of Spain
Charles IV, Duke of Lorraine	Nicole, Duchess of Lorraine	23 May 1621	1621	First cousins	Charles III, Duke of Lorraine
Charles V, Holy Roman Emperor	Isabella of Portugal	Seville, 10 March 1526	1526	First cousins	Ferdinand II of Aragon and Isabella I of Castile
Charles V, Duke of Lorraine	Eleanor of Austria, Queen of Poland	6 February 1678	1678	Third cousins	Francis I, Duke of Lorraine
Charles VII of France	Marie of Anjou	18 December 1422	1422	Second cousins	John II of France
Charles VII, Holy Roman Emperor	Maria Amalia of Austria	5 October 1722	1722	Third cousins	Ferdinand II, Holy Roman Emperor
Charles VIII of France	Anne of Brittany	6 December 1491	1491	Third cousins	Charles V of France
Charles IX of France	Elisabeth of Austria, Queen of France	26 November 1570	1570	Fourth cousins	Gaston IV, Count of Foix and Eleanor of Navarre
Charles X of France	Princess Maria Theresa of Savoy	Palace of Versailles, 16 November 1773	1773	Double second cousins once removed	Louis, Dauphin of France; Victor Amadeus II of Sardinia
Charles X Gustav of Sweden	Hedwig Eleonora of Holstein-Gottorp	24 October 1654	1654	Third cousins	Philip I, Landgrave of Hesse
Charles XI of Sweden	Ulrika Eleonora of Denmark	26 September 1679	1679	Second cousins once removed	Frederick II of Denmark
Charles XIII of Sweden	Hedvig Elisabeth Charlotte of Holstein-Gottorp	7 July 1774	1774	First cousins	Christian August of Holstein-Gottorp, Prince of Eutin
Charles XV of Sweden	Louise of the Netherlands	19 June 1850	1850	Third cousins	Prince George William of Hesse-Darmstadt
Prince Charles of Hesse and by Rhine	Princess Elisabeth of Prussia	22 October 1836	1836	Second cousins	Louis IX, Landgrave of Hesse-Darmstadt
Prince Charles of Hesse-Kassel	Princess Louise of Denmark	30 August 1766	1766	First cousins	George II of Great Britain
Prince Charles of Prussia	Princess Marie of Saxe-Weimar-Eisenach	26 May 1827	1827	Second cousins	Louis IX, Landgrave of Hesse-Darmstadt
Charles, Count of Angoulême	Louise of Savoy	16 February 1488	1488	Third cousins once removed	John II of France
Charles, Duke of Aumale	Marie of Lorraine	10 November 1576	1576	First cousins	Claude, Duke of Guise
Charles, Duke of Berry	Marie Louise Elisabeth d'Orléans	6 July 1710	1710	Half-first cousins	Louis XIV of France
Charles, Prince of Viana	Agnes of Cleves	30 September 1439	1439	Third cousins	John II of France
Charles, Prince of Wales	Diana Spencer (first wife)	St Paul's Cathedral, 29 July 1981	1981	Seventh cousins once removed	William Cavendish, 3rd Duke of Devonshire
Charles, Prince of Wales	Camilla Shand Parker Bowles (second wife)	9 April 2005	2005	Ninth cousins once removed	Henry Cavendish, 2nd Duke of Newcastle
Charles, Prince Napoléon	Princess Béatrice of Bourbon-Two Sicilies	19 December 1978	1978	Fourth cousins once removed	Leopold II, Holy Roman Emperor
Charles Albert of Sardinia	Maria Theresa of Austria	30 September 1817	1817	Fourth cousins	Leopold I, Holy Roman Emperor
Charles Alexander, Grand Duke of Saxe-Weimar-Eisenach	Princess Sophie of the Netherlands	8 October 1842	1842	First cousins	Paul I of Russia
Prince Charles Alexander of Lorraine	Archduchess Maria Anna of Austria	7 January 1744	1744	Half-second cousins	Ferdinand III, Holy Roman Emperor
Charles Amadeus, Duke of Nemours	Élisabeth de Bourbon	11 July 1643	1643	Second cousins once removed	Philippe, Duke of Nemours
Charles Augustus, Hereditary Grand Duke of Saxe-Weimar-Eisenach	Princess Pauline of Saxe-Weimar-Eisenach	26 August 1873	1873	Second cousins	Karl August, Grand Duke of Saxe-Weimar-Eisenach
Charles Edward, Duke of Saxe-Coburg and Gotha	Princess Victoria Adelaide of Schleswig-Holstein	11 October 1905	1905	Half-second cousins once removed	Princess Victoria of Saxe-Coburg-Saalfeld
Charles Emmanuel I, Duke of Savoy	Infanta Catherine Michelle of Spain	1582	1582	First cousins once removed (through Francis I of France); Second cousins (through Manuel I of Portugal)	Francis I of France; Manuel I of Portugal
Charles Emmanuel II, Duke of Savoy	Françoise Madeleine d'Orléans (first wife)	4 March 1663	1663	First cousins	Henry IV of France
Charles Emmanuel II, Duke of Savoy	Marie Jeanne Baptiste of Savoy-Nemours (second wife)	20 May 1665	1665	Half-first cousins once removed	Henry IV of France
Charles Emmanuel III of Sardinia	Anne Christine of Sulzbach, Princess of Piedmont (first wife)	15 March 1722	1722	Fourth cousins	Frederick II of Denmark
Charles Emmanuel III of Sardinia	Elisabeth Therese of Lorraine (third wife)	1 April 1737	1737	Half-first cousins	Philippe I, Duke of Orléans
Charles Emmanuel IV of Sardinia	Marie Clotilde of France	Palace of Versailles, 27 August 1775	1775	Double second cousin once removed	Victor Amadeus II of Sardinia; Louis, Dauphin of France
Charles Eugene, Duke of Württemberg	Margravine Elisabeth Fredericka Sophie of Brandenburg-Bayreuth	26 September 1748	1748	Fourth cousins twice removed	Joachim Frederick, Elector of Brandenburg
Charles Felix of Sardinia	Princess Maria Cristina of Naples and Sicily	Palermo, 6 April 1807	1807	First cousins once removed	Philip V of Spain
Charles Ferdinand, Duke of Berry	Marie-Caroline de Bourbon-Sicile, duchesse de Berry	24 April 1816	1816	Second cousins once removed	Philip V of Spain
Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach	Grand Duchess Maria Pavlovna of Russia	3 August 1804	1804	Third cousins	Frederick William I of Prussia
Charles Frederick, Grand Duke of Baden	Landgravine Caroline Louise of Hesse-Darmstadt	January 28, 1751	1751	Half-second cousins once removed	Louis VI, Landgrave of Hesse-Darmstadt
Charles Gonthier, Prince of Schwarzburg-Sondershausen	Princess Marie Gasparine of Saxe-Altenburg	12 June 1869	1869	Fourth cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Charles Louis, Hereditary Prince of Baden	Princess Amalie of Hesse-Darmstadt	15 July 1775	1775	First cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Charles Lucien Bonaparte	Zénaïde Bonaparte	29 June 1822	1822	First cousins	Carlo Buonaparte
Prince Charles Philippe, Duke of Anjou	Diana Álvares Pereira de Melo, 11th Duchess of Cadaval	21 June 2008	2008	Fifth cousins once removed	Francis I of the Two Sicilies
Archduke Charles Stephen of Austria	Archduchess Maria Theresa of Austria	28 February 1886	1886	Second cousins once removed	Leopold II, Holy Roman Emperor
Charles Theodore, Elector of Bavaria	Countess Palatine Elisabeth Auguste of Sulzbach	17 January 1742	1742	First cousins	Theodore Eustace, Count Palatine of Sulzbach
Charles William Ferdinand, Duke of Brunswick-Wolfenbüttel	Princess Augusta of Great Britain	16 January 1764	1764	Second cousins	George I of Great Britain
Charles William Frederick, Margrave of Brandenburg-Ansbach	Princess Friederike Luise of Prussia	30 May 1729	1729	Fourth cousins twice removed	John George, Elector of Brandenburg
Charlotte, Grand Duchess of Luxembourg	Prince Felix of Bourbon-Parma	6 November 1919	1919	First cousins	Miguel of Portugal
Christian II of Denmark	Isabella of Austria	11 July 1514	1514	Third cousins	Ernest, Duke of Austria
Christian II, Elector of Saxony	Hedwig of Denmark	12 September 1602	1602	First cousins once removed	Christian III of Denmark
Christian III of Denmark	Dorothea of Saxe-Lauenburg	29 October 1525	1525	Double third cousins	Frederick I, Elector of Brandenburg; Frederick I, Elector of Saxony
Christian IV of Denmark	Anne Catherine of Brandenburg	27 November 1597	1597	Second cousins once removed	Joachim I Nestor, Elector of Brandenburg
Christian V of Denmark	Charlotte Amalie of Hesse-Kassel	25 June 1667	1667	Second cousins once removed	Joachim Frederick, Elector of Brandenburg
Christian VI of Denmark	Sophie Magdalene of Brandenburg-Kulmbach	7 August 1721	1721	Fourth cousins once removed	Christian III of Denmark
Christian VII of Denmark	Princess Caroline Matilda of Wales	Christiansborg Palace, Copenhagen, 8 November 1766	1766	First cousins	George II of Great Britain
Christian VIII of Denmark	Duchess Charlotte Frederica of Mecklenburg-Schwerin (first wife)	Ludwigslust, 21 June 1806	1806	First cousins	Ludwig, Duke of Mecklenburg-Schwerin
Christian VIII of Denmark	Caroline Amalie of Augustenburg (second wife)	22 May 1815	1815	First cousin once removed	Frederick V of Denmark
Christian IX of Denmark	Louise of Hesse-Kassel	Amalienborg Palace, Copenhagen, 26 May 1842	1842	Double second cousins	Frederick II, Landgrave of Hesse-Kassel and Princess Mary of Great Britain; Frederick V of Denmark
Christian X of Denmark	Alexandrine of Mecklenburg-Schwerin	26 April 1898	1898	Third cousins	Frederick William III of Prussia
Christian, Prince-Elect of Denmark	Magdalene Sibylle of Saxony	5 October 1634	1634	Second cousins once removed	Christian III of Denmark
Prince Christian of Schaumburg-Lippe	Princess Feodora of Denmark	9 September 1937	1937	First cousins	Frederick VIII of Denmark
Prince Christian of Schleswig-Holstein	Princess Helena of the United Kingdom	5 July 1866	1866	Third cousins	Frederick, Prince of Wales
Christian Albrecht, Prince of Hohenlohe-Langenburg	Caroline of Stolberg-Gedern	13 April 1761	1761	First cousins	Louis Crato, Count of Nassau-Saarbrücken
Christian Albert, Duke of Holstein-Gottorp	Princess Frederica Amalia of Denmark	24 October 1667	1667	Double third cousins	Christian III of Denmark; John George, Elector of Brandenburg
Christian August II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg	Countess Louise Sophie of Danneskiold-Samsøe	18 September 1820	1820	Third cousins	Christian Gyldenløve
Christian Ernst, Margrave of Brandenburg-Bayreuth	Erdmuthe Sophie of Saxony (first wife)	29 October 1662	1662	First cousins	Christian, Margrave of Brandenburg-Bayreuth
Christian Ernst, Margrave of Brandenburg-Bayreuth	Sofie Louise of Württemberg (second wife)	8 February 1671	1671	Second cousins once removed	John George, Elector of Brandenburg
Christian Louis, Duke of Brunswick-Lüneburg	Sophia Dorothea of Schleswig-Holstein-Sonderburg-Glücksburg	October 9, 1653	1653	Second cousins	Christian III of Denmark
Duke Christian Louis of Mecklenburg	Princess Barbara of Prussia	5 July 1954	1954	Fourth cousins	Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin
Christian Ludwig II, Duke of Mecklenburg-Schwerin	Duchess Gustave Caroline of Mecklenburg-Strelitz	13 November 1714	1714	Half-first cousins	Adolf Frederick I, Duke of Mecklenburg
Christopher of Bavaria	Dorothea of Brandenburg	12 September 1445	1445	Third cousins	Frederick II, Margrave of Meissen
Prince Christopher of Greece and Denmark	Princess Françoise of Orléans	11 February 1929	1929	Fourth cousins once removed	Duke Louis of Mecklenburg-Schwerin
Christopher, Duke of Mecklenburg	Dorothea of Denmark, Duchess of Mecklenburg	27 October 1573	1573	First cousins twice removed	Christian I of Denmark
Claude, Duke of Guise	Antoinette de Bourbon	9 June 1513	1513	Fifth cousins once removed	Louis I, Duke of Bourbon
Claudia Antonia	Faustus Cornelius Sulla Felix (second husband)	AD 47	0047	Second cousins	Mark Antony
Claudius, Emperor of Rome	Valeria Messalina (third wife)	Rome, AD 37 or AD 38	0038	First cousins once removed	Mark Antony and Octavia Minor
Claudius, Emperor of Rome	Agrippina the Younger (fourth wife)	49	49	Second cousins once removed^[70]	Gaius Octavius and Atia Balba Caesonia
Constantine I of Greece	Sophia of Prussia	27 October 1889	1889	Second cousins once removed (through Frederick William III of Prussia); third cousins (through Paul I of Russia)	Frederick William III of Prussia; Paul I of Russia
Constantine II of Greece	Princess Anne-Marie of Denmark	Athens, 18 September 1964	1964	Double third cousins	Christian IX of Denmark; Queen Victoria
Cosimo II de' Medici, Grand Duke of Tuscany	Archduchess Maria Maddalena of Austria	1608	1608	Second cousins twice removed	Philip I of Castile and Joanna of Castile
Cosimo III de' Medici, Grand Duke of Tuscany	Marguerite Louise d'Orléans	12 June 1661	1661	Second cousins	Francesco I de' Medici, Grand Duke of Tuscany
David II of Scotland	Joan of the Tower	17 July 1328	1328	Sixth cousins	Henry I of England
Denis of Portugal	Elizabeth of Aragon	1288	1288	Third cousins once removed	Ramon Berenguer IV, Count of Barcelona and Petronilla of Aragon
Denis, Lord of Cifuentes	Joan of Castile, Lady of Cifuentes	1372	1372	Second cousins once removed	Sancho IV of Castile
Dominik Rainer Radziwiłł	Princess Eugénie of Greece and Denmark	30 May 1938	1938	Fourth cousins	Louis, Duke of Württemberg
Countess Palatine Dorothea Sophie of Neuburg	Odoardo Farnese, Hereditary Prince of Parma (first husband)	17 September 1690	1690	Third cousins once removed	Albert V, Duke of Bavaria
Countess Palatine Dorothea Sophie of Neuburg	Francesco Farnese, Duke of Parma (second husband)	7 December 1696	1696	Third cousins once removed	Albert V, Duke of Bavaria
Drusus Caesar	Aemilia Lepida		0036	Third cousins	Scribonia
Drusus Julius Caesar	Livilla	AD 4	0004	First cousins	Tiberius Claudius Nero
Duarte of Portugal, 4th Duke of Guimarães	Isabel of Braganza, Duchess of Guimarães	1537	1537	First cousins once removed	Ferdinand, Duke of Viseu
Duarte Nuno, Duke of Braganza	Maria Francisca of Orléans-Braganza, Duchess of Braganza	13 October 1942	1942	Second cousins twice removed	John VI of Portugal
Duncan II of Scotland	Ethelreda			Second cousins	Crínán of Dunkeld
Edmund Crouchback	Blanche of Artois	29 October 1276	1276	Second cousins once removed	Henry II of England
Edmund of Langley, 1st Duke of York	Infanta Isabella of Castile (first wife)	1372	1372	Third cousins twice removed	Ferdinand III of Castile
Edmund of Langley, 1st Duke of York	Joan Holland (second wife)	c. 4 November 1393	1393	Second cousins once removed	Edward I of England
Eduard, Duke of Anhalt	Princess Louise Charlotte of Saxe-Altenburg	6 February 1895	1895	Second cousins	Frederick, Duke of Saxe-Altenburg
Edward, King of Portugal	Eleanor of Aragon, Queen of Portugal	22 September 1428	1428	Half-first cousins once removed	Peter I of Portugal
Edward I of England	Eleanor of Castile (first wife)	1254	1254	Second cousins once removed	Henry II
Edward I of England	Margaret of France (second wife)	8 September 1299	1299	First cousins once removed	Ramon Berenguer IV, Count of Provence
Edward II of England	Isabella of France	Boulogne-sur-Mer, 25 January 1308	1308	Third cousins once removed	Alfonso VIII of Castile
Edward III of England	Philippa of Hainault	York Minister, 24 January 1328	1328	Second cousins	Philip III of France
Edward IV of England	Elizabeth Woodville	1 May 1464	1464	Sixth cousins once removed	Blanche de Brienne, Baroness Tingry
Edward VII of the United Kingdom	Princess Alexandra of Denmark	St. George's Chapel, Windsor Castle, 10 March 1863	1863	Third cousins once removed; fourth cousins	Duke Louis of Mecklenburg-Schwerin; George II of Great Britain
Edward the Black Prince, Prince of Wales	Joan, 4th Countess of Kent	Windsor Castle, 10 October 1361	1361	First cousins once removed	Edward I of England
Edward of Norwich, 2nd Duke of York	Beatrice of Portugal	29 August 1381	1381	Second cousins once removed	Afonso IV of Portugal
Edward of Westminster, Prince of Wales	Anne Neville	13 December 1470	1470	Half-third cousins	John of Gaunt
Prince Edward, Duke of Kent and Strathearn	Princess Victoria of Saxe-Coburg-Saalfeld	29 May 1818	1818	Third cousins once removed	Frederick I, Duke of Saxe-Gotha-Altenburg
Prince Edward, Earl of Wessex	Sophie Rhys-Jones	19 June 1999	1999	11th cousins once removed	Nicholas St. John
Prince Eitel Friedrich of Prussia	Duchess Sophia Charlotte of Oldenburg	27 February 1906	1906	Third cousins	Frederick William III of Prussia
Eleanor of Leicester	Simon de Montfort, 6th Earl of Leicester	January 1238	1238	Half-third cousins	Henry I of England
Elias, Duke of Parma	Archduchess Maria Anna of Austria	25 May 1903	1903	Second cousins	Archduke Charles, Duke of Teschen
Archduchess Elisabeth Franziska of Austria	Archduke Ferdinand Karl Viktor of Austria-Este (first husband)	Vienna, 4 October 1847	1847	Second cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Archduchess Elisabeth Franziska of Austria	Archduke Karl Ferdinand of Austria (second husband)	Vienna, 18 April 1854	1854	First cousins	Leopold II, Holy Roman Emperor
Margravine Elisabeth Sophie of Brandenburg	Frederick Casimir Kettler (first husband)	29 April 1691	1691	First cousins	George William, Elector of Brandenburg
Margravine Elisabeth Sophie of Brandenburg	Christian Ernst, Margrave of Brandenburg-Bayreuth (second husband)	30 March 1703	1703	Second cousins twice removed	John George, Elector of Brandenburg
Queen Elizabeth II	Prince Philip, Duke of Edinburgh	Westminster Abbey, 20 November 1947	1947	Second cousins once removed (through Christian IX of Denmark); Third cousins (through Queen Victoria)	Christian IX of Denmark; Queen Victoria
Princess Elizabeth of Greece and Denmark	Carl Theodor, Count of Toerring-Jettenbach			Fourth cousins	Charles Louis, Hereditary Prince of Baden
Duchess Elsa of Württemberg	Prince Albert of Schaumburg-Lippe	6 May 1897	1897	First cousins once removed	George William, Prince of Schaumburg-Lippe
Emich, 5th Prince of Leiningen	Princess Feodore of Hohenlohe-Langenburg	12 July 1894	1894	Second cousins	Emich Carl, 2nd Prince of Leiningen and Princess Victoria of Saxe-Coburg-Saalfeld
Emich Kyrill, Prince of Leiningen	Duchess Eilika of Oldenburg	10 August 1950	1950	Half-second cousins once removed	Frederick Francis II, Grand Duke of Mecklenburg-Schwerin
Prince Emmanuel, Duke of Vendôme	Princess Henriette of Belgium	12 February 1896	1896	Second cousins	Louis Philippe I
Prince Emanuele Filiberto, Duke of Aosta	Princess Hélène of Orléans	25 June 1895	1895	Double fourth cousins	Francis I, Holy Roman Emperor and Maria Theresa; Charles III of Spain
Emmanuel Philibert, Duke of Savoy	Margaret of France, Duchess of Berry	10 July 1559	1559	Half-first cousins once removed	Philip II, Duke of Savoy
Emmanuel Théodose de La Tour d'Auvergne	Marie Armande de La Trémoille	1 February 1696	1696	Second cousins once removed	Henri de La Tour d'Auvergne, Duke of Bouillon
Enrichetta d'Este	Leopold of Hesse-Darmstadt	23 March 1740	1740	Third cousins	Louis V, Landgrave of Hesse-Darmstadt
Eric II, Duke of Brunswick-Lüneburg	Sidonie of Saxony (first wife)	17 May 1545	1545	Third cousins once removed	Frederick I, Elector of Brandenburg
Eric II, Duke of Brunswick-Lüneburg	Dorothea of Lorraine (second wife)	26 November 1575	1575	Third cousins	Christian I of Denmark
Prince Erik of Bourbon-Parma (son of Prince Michel of Bourbon-Parma)	Countess Lydia af Holstein-Ledreborg (daughter of Princess Marie Gabriele of Luxembourg)	8 August 1980	1980	Second cousins	Robert I, Duke of Parma
Ernest I, Duke of Saxe-Gotha	Princess Elisabeth Sophie of Saxe-Altenburg	24 October 1636	1636	First cousins once removed	Johann Wilhelm, Duke of Saxe-Weimar
Ernest I, Duke of Saxe-Coburg and Gotha	Princess Louise of Saxe-Gotha-Altenburg	31 July 1817	1817	Second cousins once removed	Francis Josias, Duke of Saxe-Coburg-Saalfeld
Ernest II, Duke of Saxe-Gotha-Altenburg	Princess Charlotte of Saxe-Meiningen	21 March 1769	1769	Half-first cousins once removed	Bernhard I, Duke of Saxe-Meiningen
Ernest Augustus, Elector of Brunswick-Lüneburg	Sophia of the Palatinate	30 September 1658	1658	Second cousins once removed	Christian III of Denmark
Ernest Augustus I of Hanover	Frederica of Mecklenburg-Strelitz	Carlton House, London, 29 August 1815	1815	First cousins	Duke Charles Louis Frederick of Mecklenburg
Ernest Augustus, Crown Prince of Hanover	Princess Thyra of Denmark	22 December 1878	1878	Fourth cousins	George II of Great Britain
Ernest Augustus, Duke of Brunswick	Princess Victoria Louise of Prussia	24 May 1913	1913	Third cousins once removed	George III of the United Kingdom
Ernest Frederick I, Duke of Saxe-Hildburghausen	Countess Sophia Albertine of Erbach-Erbach	4 February 1704	1704	Second cousins	William of Nassau-Hilchenbach
Ernest Frederick III, Duke of Saxe-Hildburghausen	Princess Ernestine of Saxe-Weimar	1 July 1758	1758	Fourth cousins	Johann II, Duke of Saxe-Weimar
Ernest Günther, Duke of Schleswig-Holstein-Sonderburg-Augustenburg	Auguste of Schleswig-Holstein-Sonderburg-Glücksburg	15 June 1651	1651	First cousins	John II, Duke of Schleswig-Holstein-Sonderburg
Ernest Leopold, Landgrave of Hesse-Rotenburg	Eleonore of Löwenstein-Wertheim	9 November 1704	1704	First cousins	Ferdinand Karl, Count of Löwenstein-Wertheim-Rochefort
Ernst I, Duke of Saxe-Altenburg	Princess Agnes of Anhalt-Dessau	28 April 1853	1853	Second cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Ernst II, Duke of Saxe-Altenburg	Princess Adelaide of Schaumburg-Lippe	17 February 1898	1898	Double fourth cousins	Frederick II, Landgrave of Hesse-Kassel; Duke Louis of Mecklenburg-Schwerin
Ernst II, Prince of Hohenlohe-Langenburg	Princess Alexandra of Saxe-Coburg and Gotha	20 April 1896	1896	Half second cousins	Princess Victoria of Saxe-Coburg-Saalfeld
Ernst Frederick II, Duke of Saxe-Hildburghausen	Countess Caroline of Erbach-Fürstenau	19 June 1726	1729	Second cousins	George Albert I of Erbach-Breuberg
Ernst Gunther, Duke of Schleswig-Holstein	Princess Dorothea of Saxe-Coburg and Gotha	2 August 1898	1898	Third cousins	Francis, Duke of Saxe-Coburg-Saalfeld
Prince Ernst Heinrich of Saxony	Princess Sophie of Luxembourg	12 April 1921	1921	Second cousins twice removed	John VI of Portugal
Ernst Ludwig I, Duke of Saxe-Meiningen	Dorothea Marie of Saxe-Gotha-Altenburg (first wife)	19 September 1704	1704	First cousins	Ernest I, Duke of Saxe-Gotha
Ernst Ludwig I, Duke of Saxe-Meiningen	Margravine Elisabeth Sophie of Brandenburg (second wife)	3 June 1714	1714	Third cousins	Albert Frederick, Duke of Prussia
Duke Eugen of Württemberg	Princess Helene of Hohenlohe-Langenburg	11 September 1827	1827	Third cousins	Louis Crato, Count of Nassau-Saarbrücken
Duke Eugen of Württemberg	Princess Mathilde of Schaumburg-Lippe	15 July 1843	1843	First cousins	George I, Prince of Waldeck and Pyrmont
Duke Eugen of Württemberg	Grand Duchess Vera Constantinovna of Russia	4 May 1874	1874	Third cousins	Frederick II Eugene, Duke of Württemberg
Prince Eugenio, Duke of Genoa	Princess Lucia of Bourbon-Two Sicilies	29 October 1938	1938	Second cousins once removed	Ludwig I of Bavaria
Princess Eulalia of Thurn and Taxis	Prince Philipp Ernst of Thurn and Taxis	8 September 1929	1929	Fourth cousins once removed	Alexander Ferdinand, 3rd Prince of Thurn and Taxis
Eustace IV, Count of Boulogne	Constance of France, Countess of Toulouse	1140	1140	Third cousins once removed	Robert II of France
Prince Feodor Alexandrovich of Russia	Irina Paley	21 May 1923	1923	First cousins once removed	Alexander II of Russia
Ferdinand I of Austria	Princess Maria Anna of Savoy	Vienna, 27 February 1831	1831	Second cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Ferdinand I of Bulgaria	Princess Marie Louise of Bourbon-Parma	20 April 1893	1893	Second cousins once removed	Ferdinand I of the Two Sicilies
Ferdinand I of Portugal	Leonor Teles	5 May 1372	1372	Fifth cousins	Sancho I of Portugal
Ferdinand I of Romania	Princess Marie of Edinburgh	10 January 1893	1893	Third cousins	Francis, Duke of Saxe-Coburg-Saalfeld
Ferdinand I of Naples	Joanna of Aragon, Queen of Naples	14 September 1477	1477	First cousins	Ferdinand I of Aragon
Ferdinand I of the Two Sicilies	Maria Carolina of Austria	7 April 1768	1768	Second cousins once removed	Leopold I, Holy Roman Emperor
Ferdinand I, Holy Roman Emperor	Anne of Bohemia and Hungary	26 May 1521	1521	Half-second cousins once removed	John II of Aragon
Ferdinand II of León	Urraca of Portugal (first wife)	May or June 1165	1165	Half-second cousins	Alfonso VI of León and Castile
Ferdinand II of León	Teresa Fernández de Traba (second wife)	7 October 1178	1178	Half-first cousins	Alfonso VI of León and Castile
Ferdinand II of the Two Sicilies	Princess Maria Cristina of Savoy (first wife)	Cagliari, 21 November 1832	1832	Second cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Ferdinand II of the Two Sicilies	Archduchess Maria Theresa of Austria (second wife)	Vienna, 9 January 1837	1837	Double second cousins	Charles III of Spain; Francis I, Holy Roman Emperor and Maria Theresa of Austria
Ferdinand II, Holy Roman Emperor	Maria Anna of Bavaria (first wife)	23 April 1600	1600	First cousins	Albert V, Duke of Bavaria
Ferdinand II, Holy Roman Emperor	Eleonora Gonzaga (second wife)	2 February 1622	1622	First cousins once removed	Ferdinand I, Holy Roman Emperor
Ferdinand II, Archduke of Austria	Anna Juliana Gonzaga	14 May 1582	1582	Half-fourth cousins twice removed^[70]	Ferdinand I of Aragon
Ferdinand III, Holy Roman Emperor	Maria Anna of Spain (first wife)	20 February 1631	1631	First cousins	Charles II, Archduke of Austria
Ferdinand III, Holy Roman Emperor	Maria Leopoldine of Austria (second wife)	2 July 1648	1648	First cousins	Charles II, Archduke of Austria
Ferdinand III, Holy Roman Emperor	Eleonora Gonzaga (third wife)	30 April 1651	1651	Second cousins twice removed	Ferdinand I, Holy Roman Emperor
Ferdinand III, Grand Duke of Tuscany	Princess Luisa of Naples and Sicily (first wife)	Florence, 15 August 1790	1790	Double first cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria; Charles III of Spain and Maria Amalia of Saxony
Ferdinand III, Grand Duke of Tuscany	Princess Maria Ferdinanda of Saxony (second wife)	6 May 1821	1821	First cousins once removed	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Ferdinand IV, Grand Duke of Tuscany	Princess Anna of Saxony (first wife)	24 November 1856	1856	Double third cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria; Philip, Duke of Parma
Ferdinand IV, Grand Duke of Tuscany	Princess Alice of Parma (second wife)	11 January 1868	1868	Half-first cousins once removed	Francis I of the Two Sicilies
Ferdinand IV of Castile	Constance of Portugal	23 January 1302	1302	Half-first cousins once removed	Alfonso X of Castile
Ferdinand VI of Spain	Barbara of Portugal	1729	1729	Third cousins once removed	Philip III of Spain
Ferdinand VII of Spain	Princess Maria Antonia of Naples and Sicily (first wife)	6 October 1802	1802	First cousins	Charles III of Spain
Ferdinand VII of Spain	Maria Isabel of Portugal (second wife)	29 September 1816	1816	Second cousins once removed^[70]	Philip V of Spain
Ferdinand VII of Spain	Maria Josepha Amalia of Saxony (third wife)	20 October 1819	1819	First cousins once removed	Philip, Duke of Parma
Ferdinand VII of Spain	Maria Christina of the Two Sicilies (fourth wife)	11 December 1829	1829	First cousins once removed^[70]	Charles III of Spain
Ferdinand, Duke of Parma	Archduchess Maria Amalia of Austria	19 July 1769	1769	Third cousins once removed	Louis XIII of France
Ferdinand, Hereditary Prince of Denmark	Princess Caroline of Denmark	1 August 1829	1829	Half-first cousins once removed	Frederick V of Denmark
Prince Ferdinand of Bavaria	Infanta Maria Teresa of Spain	12 January 1906	1906	First cousins	Isabel II of Spain
Ferdinand, Duke of Breisgau	Maria Beatrice d'Este, Duchess of Massa	5 October 1771	1771	Second cousins once removed	Philippe I, Duke of Orléans
Ferdinand, Duke of Viseu	Beatrice, Duchess of Viseu	1447	1447	First cousins	John I of Portugal
Ferdinand Albert II, Duke of Brunswick-Wolfenbüttel	Princess Antoinette of Brunswick-Wolfenbüttel	15 October 1712	1712	First cousins once removed	Augustus the Younger, Duke of Brunswick-Lüneburg
Ferdinand Charles, Archduke of Austria	Anna de' Medici, Archduchess of Austria	10 June 1646	1646	Double first cousins	Charles II, Archduke of Austria; Ferdinando I de' Medici, Grand Duke of Tuscany
Prince Ferdinand Pius, Duke of Calabria	Princess Maria Ludwiga Theresia of Bavaria	31 May 1897	1897	Second cousins	Leopold II, Grand Duke of Tuscany
Prince Ferdinando, Duke of Genoa	Princess Elisabeth of Saxony	22 April 1850	1850	Double third cousins	Augustus III of Poland; Francis I, Holy Roman Emperor and Maria Theresa
Ferdinando Gonzaga, Duke of Mantua	Catherine de' Medici, Governor of Siena	February 16, 1617	1617	First cousins once removed	Cosimo I de' Medici, Grand Duke of Tuscany
Ferdinando Carlo Gonzaga, Duke of Mantua and Montferrat	Anna Isabella Gonzaga (first wife)	1671	1671	Second cousins once removed; third cousins	Charles Emmanuel I, Duke of Savoy; Cosimo I de' Medici, Grand Duke of Tuscany
Ferdinando Carlo Gonzaga, Duke of Mantua and Montferrat	Suzanne Henriette of Lorraine (second wife)	8 November 1704	1704	Fifth cousins once removed	René II, Duke of Lorraine
Ferdinando de' Medici, Grand Prince of Tuscany	Duchess Violante Beatrice of Bavaria	9 January 1689	1689	Third cousins	Charles II, Archduke of Austria
Ferdinando II de' Medici, Grand Duke of Tuscany	Vittoria della Rovere	26 September 1633	1633	First cousins	Ferdinando I de' Medici, Grand Duke of Tuscany
Fernando II, Duke of Braganza	Isabella of Viseu	1472	1472	Half-second cousins	John I of Portugal
Francesco I d'Este, Duke of Modena	Maria Caterina Farnese (first wife)	11 January 1631	1631	Third cousins	Charles V, Holy Roman Emperor
Francesco I d'Este, Duke of Modena	Vittoria Farnese d'Este (second wife)	12 February 1648	1648	Third cousins	Charles V, Holy Roman Emperor
Francesco II d'Este, Duke of Modena	Margherita Maria Farnese	14 July 1692	1692	First cousins	Francesco I d'Este, Duke of Modena
Francesco III d'Este, Duke of Modena	Charlotte Aglaé d'Orléans	11 February 1720	1720	Third cousins	Frederick V, Elector Palatine
Francesco IV Gonzaga, Duke of Mantua	Margaret of Savoy, Vicereine of Portugal	19 February 1608	1608	Third cousins	Philip I of Castile and Joanna of Castile
Francesco Maria de' Medici, Duke of Rovere and Montefeltro	Eleonora Luisa Gonzaga	14 July 1709	1709	Third cousins once removed	Cosimo I de' Medici, Grand Duke of Tuscany
Francis I of France	Claude of France, Duchess of Brittany (first wife)	Saint-Germain-en-Laye, 18 May 1514	1514	Second cousins	Louis I, Duke of Orléans
Francis I of France	Eleanor of Austria (second wife)	4 July 1530	1530	Second cousins once removed	Charles I, Duke of Bourbon
Francis I of the Two Sicilies	Archduchess Maria Clementina of Austria (first wife)	Foggia, 26 June 1797	1797	Double first cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria; Charles III of Spain and Maria Amalia of Saxony
Francis I of the Two Sicilies	María Isabella of Spain (second wife)	Barcelona, 6 July 1820	1820	First cousin	Charles III of Spain
Francis I, Holy Roman Emperor	Maria Theresa of Austria	12 February 1736	1736	Half-second cousins	Ferdinand III, Holy Roman Emperor
Francis II, Holy Roman Emperor	Princess Maria Theresa of Naples and Sicily (second wife)	15 September 1790	1790	Double first cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria; Charles III of Spain and Maria Amalia of Saxony
Francis II, Holy Roman Emperor	Archduchess Maria Ludovika of Austria-Este (third wife)	6 January 1808	1808	First cousin	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Francis IV, Duke of Modena	Maria Beatrice of Savoy	20 June 1812	1812	Third cousins once removed^[70]	Philippe I, Duke of Orléans
Francis, Duke of Saxe-Coburg-Saalfeld	Princess Sophie of Saxe-Hildburghausen	6 March 1776	1776	Third cousins once removed	Ernest I, Duke of Saxe-Gotha
Prince Francis, Count of Trapani	Archduchess Maria Isabella of Austria	10 April 1850	1850	First cousins once removed^[70]	Ferdinand I of the Two Sicilies
Francis, Duke of Teck	Princess Mary Adelaide of Cambridge	12 June 1866	1866	Third cousins once removed	George II of Great Britain
Francis, Count of Vendôme	Marie of Luxembourg, Countess of Vendôme	1487	1487	Second cousins once removed	John I, Count of La Marche
Francis Josias, Duke of Saxe-Coburg-Saalfeld	Princess Anna Sophie of Schwarzburg-Rudolstadt	2 January 1723	1723	First cousins once removed	Ernest I, Duke of Saxe-Gotha
Infante Francisco de Paula of Spain	Princess Luisa Carlotta of Naples and Sicily	12 June 1819	1819	First cousins once removed^[70]	Charles III of Spain
François d'Orléans, Prince of Joinville	Princess Francisca of Brazil	1 May 1843	1843	First cousins once removed	Ferdinand I of the Two Sicilies
François de Bourbon, Prince of Conti	Louise Marguerite of Lorraine	24 July 1605	1605	First cousins once removed	Charles, Duke of Vendôme
François Louis, Prince of Conti	Marie Thérèse de Bourbon	22 January 1688	1688	First cousins once removed	Henri, Prince of Condé
Franz, Duke of Hohenberg	Princess Elisabeth of Luxembourg	9 May 1956	1956	Half-fourth cousins	Francis I of the Two Sicilies
Archduke Franz Ferdinand of Austria	Sophie, Duchess of Hohenberg	1899	1899	First Cousins several times removed	Albert IV, Count of Habsburg
Franz Joseph I of Austria	Duchess Elisabeth in Bavaria	St. Augustine's Church, Vienna, 24 April 1854	1854	First cousins	Maximilian I Joseph of Bavaria
Franz Joseph II, Prince of Liechtenstein	Countess Georgina von Wilczek	7 March 1943	1943	Fourth cousins once removed	Joseph, 4th Prince Kinsky of Wchinitz and Tettau
Franz Joseph, Prince of Hohenzollern-Emden	Princess Maria Alix of Saxony	25 May 1921	1921	Second cousins	Ferdinand II of Portugal and Maria II of Portugal
Franz Joseph, 9th Prince of Thurn and Taxis	Princess Isabel Maria of Braganza	23 November 1920	1920	Fourth cousins	Charles III of Spain
Archduke Franz Salvator of Austria	Archduchess Marie Valerie of Austria	31 July 1890	1890	Double third cousins	Leopold II, Holy Roman Emperor; Ferdinand I of the Two Sicilies
Frederick I, Duke of Anhalt	Princess Antoinette of Saxe-Altenburg	22 April 1854	1854	Second cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Frederick I, Grand Duke of Baden	Princess Louise of Prussia	20 September 1856	1856	Third cousins	Louis IX, Landgrave of Hesse-Darmstadt
Frederick I of Denmark	Anna of Brandenburg (first wife)	10 April 1502	1502	Second cousins	Frederick I, Elector of Brandenburg
Frederick I of Denmark	Sophie of Pomerania (second wife)	9 October 1518	1518	Third cousins once removed	Magnus II, Duke of Brunswick-Lüneburg
Frederick I of Sweden	Princess Luise Dorothea of Prussia (first wife)	31 May 1700	1700	First cousins	William VI, Landgrave of Hesse-Kassel
Frederick I of Sweden	Ulrika Eleonora, Queen of Sweden (second wife)	24 March 1715	1715	Third cousins once removed	Joachim Frederick, Elector of Brandenburg
Frederick I of Württemberg	Duchess Augusta of Brunswick-Wolfenbüttel (first wife)	15 October 1780	1780	Third cousins	George I of Great Britain
Frederick I of Württemberg	Charlotte, Princess Royal (second wife)	18 May 1797	1797	Third cousins	George I of Great Britain
Frederick I of Prussia	Elisabeth Henriette of Hesse-Kassel (first wife)	1679	1679	First cousins	George William, Elector of Brandenburg
Frederick I of Prussia	Sophia Charlotte of Hanover (second wife)	8 October 1684	1684	Second cousins	Frederick IV, Elector Palatine
Frederick II of Prussia	Elisabeth Christine of Brunswick-Wolfenbüttel-Bevern	12 June 1733	1733	Fourth cousins once removed	Ernest I, Duke of Brunswick-Lüneburg
Frederick II of Denmark	Sophie of Mecklenburg-Güstrow	July 20, 1572	1572	Half-first cousins	Frederick I of Denmark
Frederick II, Elector Palatine	Dorothea of Denmark, Electress Palatine	18 May 1535	1535	Second cousins once removed	Frederick II, Elector of Saxony
Frederick II, Elector of Saxony	Margaret of Austria, Electress of Saxony	3 June 1431	1431	Third cousins once removed	Albert I of Germany
Frederick II, Grand Duke of Baden	Princess Hilda of Nassau	20 September 1885	1885	Third cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Frederick II, Duke of Saxe-Gotha-Altenburg	Princess Magdalena Augusta of Anhalt-Zerbst	7 June 1696	1696	First cousins	Augustus, Duke of Saxe-Weissenfels
Frederick II, Landgrave of Hesse-Kassel	Princess Mary of Great Britain (first wife)	28 June 1740	1740	Fourth cousins	Frederick IV, Elector Palatine
Frederick II, Landgrave of Hesse-Kassel	Margravine Philippine of Brandenburg-Schwedt (second wife)	10 January 1773	1773	Fourth cousins	Frederick IV, Elector Palatine
Frederick II Eugene, Duke of Württemberg	Margravine Friederike of Brandenburg-Schwedt	2 November 1753	1753	Fourth cousins once removed	Joachim Frederick, Elector of Brandenburg
Frederick III, German Emperor	Victoria, Princess Royal	Chapel Royal, St. James's Palace, 25 January 1858	1858	Third cousins	Duke Charles Louis Frederick of Mecklenburg
Frederick III of Denmark	Sophie Amalie of Brunswick-Lüneburg	1 October 1643	1643	Second cousins	Christian III of Denmark
Frederick III, Duke of Holstein-Gottorp	Duchess Marie Elisabeth of Saxony	21 February 1630	1630	Second cousins once removed	Christian III of Denmark
Frederick III, Duke of Saxe-Gotha-Altenburg	Princess Luise Dorothea of Saxe-Meiningen	17 September 1729	1729	First cousins	Frederick I, Duke of Saxe-Gotha-Altenburg
Frederick IV of Denmark	Louise of Mecklenburg-Güstrow	5 December 1695	1695	Third cousins	Frederick II of Denmark
Frederick IV, Duke of Holstein-Gottorp	Hedvig Sophia of Sweden	12 May 1698	1698	First cousins (through Frederick III of Denmark); first cousins once removed (though Frederick III, Duke of Holstein-Gottorp)	Frederick III of Denmark; Frederick III, Duke of Holstein-Gottorp
Frederick V, Elector Palatine	Elizabeth Stuart, Queen of Bohemia	14 February 1613	1613	Fourth cousins	Magnus II, Duke of Mecklenburg
Frederick V, Landgrave of Hesse-Homburg	Landgravine Caroline of Hesse-Darmstadt	27 September 1768	1768	Fourth cousins twice removed	George I, Landgrave of Hesse-Darmstadt
Frederick V of Denmark	Louise of Great Britain (first wife)	11 December 1743	1743	Third cousins once removed	George, Duke of Brunswick-Lüneburg
Frederick V of Denmark	Juliana Maria of Brunswick-Wolfenbüttel (second wife)	8 July 1752	1752	Half-third cousins	John Albert II, Duke of Mecklenburg
Frederick VI of Denmark	Princess Marie Sophie of Hesse-Kassel	Gottorp, 31 July 1790	1790	First cousins	Frederick V of Denmark
Frederick VI, Landgrave of Hesse-Homburg	Princess Elizabeth of the United Kingdom	7 April 1818	1818	Fourth cousins	Albert II, Margrave of Brandenburg-Ansbach
Frederick VII of Denmark	Princess Vilhelmine Marie of Denmark (first wife)	Copenhagen, 1 November 1828	1828	Second cousins	Frederick V of Denmark
Frederick VII of Denmark	Duchess Caroline Mariane of Mecklenburg (second wife)	10 June 1841	1841	Third cousins once removed	Adolphus Frederick II, Duke of Mecklenburg-Strelitz
Frederick IX of Denmark	Princess Ingrid of Sweden	Stockholm, 24 May 1935	1935	Double third cousins	Oscar I of Sweden; Leopold, Grand Duke of Baden
Frederick the Simple	Constance of Aragon, Queen of Sicily	11 April 1361	1361	Second cousins once removed	Peter III of Aragon
Frederick, Prince of Wales	Princess Augusta of Saxe-Gotha	27 April 1736	1736	Third cousins once removed	Johann II, Duke of Saxe-Weimar
Prince Frederick, Duke of York and Albany	Princess Frederica Charlotte of Prussia	29 September 1791	1791	Third cousins	George I of Great Britain
Prince Frederick of the Netherlands	Princess Louise of Prussia	21 May 1825	1825	First cousins	Frederick William II of Prussia
Prince Frederick of Prussia	Princess Luise of Anhalt-Bernburg	21 November 1817	1817	Fourth cousins once removed	George I of Great Britain
Prince Frederick of Schaumburg-Lippe	Princess Louise of Denmark (first wife)	5 May 1896	1896	Second cousins	Prince William of Hesse-Kassel
Prince Frederick of Schaumburg-Lippe	Princess Antoinette of Anhalt (second wife)	26 May 1909	1909	Second cousins	Prince William of Hesse-Kassel
Prince Frederick of Württemberg	Princess Catherine of Württemberg	20 November 1845	1845	First cousins	Frederick I of Württemberg
Frederick, Duke of Württemberg-Neuenstadt	Clara Augusta of Brunswick-Lüneburg	7 June 1653	1653	Fourth cousins once removed	John Cicero, Elector of Brandenburg
Frederick, Duke of Saxe-Altenburg	Duchess Charlotte Georgine of Mecklenburg-Strelitz	3 September 1785	1785	Second cousins	Ernest Frederick I, Duke of Saxe-Hildburghausen
Frederick, Prince of Hohenzollern	Princess Margarete Karola of Saxony	2 June 1920	1920	Second cousins	Ferdinand II of Portugal and Maria II of Portugal
Prince Frederick of Hohenzollern-Sigmaringen	Princess Louise of Thurn and Taxis	21 June 1879	1879	Second cousins once removed	Charles Louis, Hereditary Prince of Baden
Frederick, Margrave of Brandenburg-Bayreuth	Wilhelmine of Prussia, Margravine of Brandenburg-Bayreuth	November 20, 1731	1731	Fourth cousins twice removed	John George, Elector of Brandenburg
Frederick Anton, Prince of Schwarzburg-Rudolstadt	Princess Sophia Wilhelmina of Saxe-Coburg-Saalfeld	8 February 1720	1720	First cousins once removed	Ernest I, Duke of Saxe-Gotha
Frederick August I, Duke of Oldenburg	Princess Ulrike Friederike Wilhelmine of Hesse-Kassel	21 November 1752	1752	Fourth cousins once removed	Joachim Frederick, Elector of Brandenburg
Prince Frederick Augustus of Anhalt-Dessau	Princess Marie Luise Charlotte of Hesse-Kassel	11 September 1832	1832	Fifth cousins	Albert II, Margrave of Brandenburg-Ansbach
Frederick Augustus II, Grand Duke of Oldenburg	Princess Elisabeth Anna of Prussia (first wife)	18 February 1878	1878	Third cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Frederick Augustus II, Grand Duke of Oldenburg	Duchess Elisabeth Alexandrine of Mecklenburg-Schwerin (second wife)	24 October 1896	1896	Third cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Frederick Augustus II of Saxony	Archduchess Marie Caroline of Austria	7 October 1819	1819	Second cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Frederick Augustus III of Saxony	Archduchess Louise of Austria	21 November 1891	1891	Double third cousins once removed	Leopold II, Holy Roman Emperor; Charles IV of Spain
Prince Frederick Charles of Hesse	Princess Margaret of Prussia	25 January 1893	1893	Double second cousins	Frederick William III of Prussia; Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach
Frederick Charles, Duke of Württemberg-Winnental	Eleonore Juliane of Brandenburg-Ansbach	31 October 1682	1682	Second cousins once removed	John George, Elector of Brandenburg
Frederick Christian, Elector of Saxony	Duchess Maria Antonia of Bavaria	13 June 1747	1747	First cousins	Joseph I, Holy Roman Emperor
Frederick Christian II, Duke of Schleswig-Holstein-Sonderburg-Augustenburg	Princess Louise Auguste of Denmark	27 May 1786	1786	Third cousins once removed	Christian V of Denmark
Frederick Francis I, Grand Duke of Mecklenburg-Schwerin	Princess Louise of Saxe-Gotha-Altenburg	1 June 1775	1775	Third cousins	Ernest I, Duke of Saxe-Gotha
Frederick Francis II, Grand Duke of Mecklenburg-Schwerin	Princess Anna of Hesse and by Rhine (second wife)	4 July 1864	1864	Second cousins	Frederick William II of Prussia
Frederick Francis II, Grand Duke of Mecklenburg-Schwerin	Princess Marie of Schwarzburg-Rudolstadt (third wife)	4 July 1868	1868	Third cousins	Louis IX, Landgrave of Hesse-Darmstadt
Frederick Francis III, Grand Duke of Mecklenburg-Schwerin	Grand Duchess Anastasia Mikhailovna of Russia	24 January 1879	1879	Second cousins; second cousins once removed	Frederick William III of Prussia; Paul I of Russia
Frederick Francis IV, Grand Duke of Mecklenburg-Schwerin	Princess Alexandra of Hanover	7 June 1904	1904	Fourth cousins once removed	Duke Louis of Mecklenburg-Schwerin
Frederick Louis, Hereditary Grand Duke of Mecklenburg-Schwerin	Princess Caroline Louise of Saxe-Weimar-Eisenach	1 July 1810	1810	Fifth cousins once removed	Johann II, Duke of Saxe-Weimar
Frederick William I of Prussia	Princess Sophia Dorothea of Hanover	28 November 1706	1706	First cousins	Ernest Augustus, Elector of Brunswick-Lüneburg and Sophia of the Palatinate
Frederick William II of Prussia	Elisabeth Christine of Brunswick-Wolfenbüttel	Schloss Salzdahlum, 14 July 1765	1765	Double first cousins	Frederick William I of Prussia and Princess Sophia Dorothea of Hanover; Ferdinand Albert II, Duke of Brunswick-Lüneburg and Duchess Antoinette of Brunswick-Wolfenbüttel
Frederick William III of Prussia	Louise of Mecklenburg-Strelitz	24 December 1793	1793	Second cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Frederick William IV of Prussia	Elisabeth Ludovika of Bavaria	29 November 1823	1823	Second cousins	Louis IX, Landgrave of Hesse-Darmstadt
Frederick William, Grand Duke of Mecklenburg-Strelitz	Princess Augusta of Cambridge	28 June 1843	1843	First cousins through Prince Frederick of Hesse-Kassel; second cousins through Duke Charles Louis Frederick of Mecklenburg	Prince Frederick of Hesse-Kassel; Duke Charles Louis Frederick of Mecklenburg
Frederick William, Duke of Brunswick-Wolfenbüttel	Princess Marie of Baden	1 November 1802	1802	Half-third cousins once removed	John Frederick, Margrave of Brandenburg-Ansbach
Prince Frederick William of Hesse-Kassel	Grand Duchess Alexandra Nikolaevna of Russia (first wife)	28 January 1844	1844	Half-fourth cousins	Adolphus Frederick II, Duke of Mecklenburg-Strelitz
Prince Frederick William of Hesse-Kassel	Princess Anna of Prussia (second wife)	26 May 1853	1853	Half-fourth cousins	Adolphus Frederick II, Duke of Mecklenburg-Strelitz
Prince Frederick William of Solms-Braunfels	Frederica of Mecklenburg-Strelitz	10 December 1798	1798	Fourth cousins twice removed	Johann VII, Duke of Mecklenburg
Frederick William, Margrave of Brandenburg-Schwedt	Princess Sophia Dorothea of Prussia	10 November 1734	1734	First cousins once removed	Frederick William, Elector of Brandenburg
Duke Friedrich of Württemberg	Princess Marie of Wied	11 November 1993	1993	Sixth cousins once removed	Frederick II Eugene, Duke of Württemberg
Friedrich II, Duke of Anhalt	Princess Marie of Baden	2 July 1889	1889	Double third cousins once removed	Frederick William II of Prussia; Charles II, Grand Duke of Mecklenburg-Strelitz
Friedrich, Prince of Waldeck and Pyrmont	Princess Bathildis of Schaumburg-Lippe	9 August 1895	1895	Second cousins	George I, Prince of Waldeck and Pyrmont
Prince Friedrich of Saxe-Meiningen	Countess Adelaide of Lippe-Biesterfeld	24 April 1889	1889	Second cousins once removed	Karl Ludwig, Prince of Hohenlohe-Langenburg
Duke Friedrich August of Oldenburg	Princess Marie Cécile of Prussia	3 December 1965	1965	Fourth cousins once removed	Frederick William III of Prussia
Friedrich Christian, Margrave of Meissen	Princess Elisabeth Helene of Thurn and Taxis	16 June 1923	1923	Third cousins	Maximilian I Joseph of Bavaria
Prince Friedrich Christian of Schaumburg-Lippe	Princess Marie Louise of Schleswig-Holstein-Sonderburg-Glücksburg	15 October 1962	1962	Second cousins	George William, Prince of Schaumburg-Lippe
Friedrich Ferdinand, Duke of Schleswig-Holstein	Princess Karoline Mathilde of Schleswig-Holstein-Sonderburg-Augustenburg	19 March 1885	1885	Third cousins once removed	Frederick V of Denmark
Prince Friedrich Ferdinand of Schleswig-Holstein-Sonderburg-Glücksburg	Duchess Anastasia of Mecklenburg-Schwerin	1 September 1943	1943	Second cousins once removed	Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Friedrich Günther, Prince of Schwarzburg	Princess Sophie of Saxe-Weimar-Eisenach	7 March 1938	1938	Fifth cousins	Frederick William II of Prussia
Friedrich Günther, Prince of Schwarzburg-Rudolstadt	Auguste of Anhalt-Dessau	15 April 1816	1816	First cousins	Frederick V, Landgrave of Hesse-Homburg
Friedrich Josias, Prince of Saxe-Coburg and Gotha	Countess Viktoria-Luise of Solms-Baruth	25 January 1942	1942	First cousins	Friedrich Ferdinand, Duke of Schleswig-Holstein
Prince Friedrich Karl of Prussia	Princess Maria Anna of Anhalt-Dessau	29 November 1854	1854	Second cousins	Frederick William II of Prussia
Prince Friedrich Sigismund of Prussia	Princess Marie Louise of Schaumburg-Lippe	April 27, 1916	1916	Third cousins once removed	Frederick William III of Prussia
Friedrich Wilhelm II, Duke of Saxe-Altenburg	Magdalene Sibylle of Saxony	1 October 1652	1652	Second cousins	William, Duke of Jülich-Cleves-Berg
Friedrich Wilhelm, Prince of Wied	Princess Guda of Waldeck and Pyrmont	9 September 1958	1958	Second cousins once removed	George Victor, Prince of Waldeck and Pyrmont
Friedrich Wilhelm, Prince of Hohenzollern	Princess Margarita of Leiningen	5 January 1951	1951	Half-fourth cousins twice removed	Charles Frederick, Grand Duke of Baden
Infante Gabriel of Spain	Infanta Maria Ana Vitória of Portugal	12 April 1785	1785	First cousins once removed	Philip V of Spain
Prince Gabriel of Bourbon-Two Sicilies	Princess Malgorzata Izabella Czartoryska	25 August 1927	1927	Third cousins once removed	Ferdinand I of the Two Sicilies
Prince Gaetan, Count of Girgenti	Isabella, Princess of Asturias	13 May 1868	1868	First cousins once removed	Francis I of the Two Sicilies
Gaius Caesar	Livilla	1 BC	1 BC	Second cousins	Gaius Octavius and Atia Balba Caesonia
Gaston, Duke of Orléans	Marie de Bourbon, Duchess of Montpensier (first wife)	6 August 1626	1626	Fourth cousins	John VIII, Count of Vendôme
Gaston, Duke of Orléans	Marguerite of Lorraine (second wife)	2–3 January 1632	1632	Third cousins once removed	Philip I of Castile and Joanna of Castile
Gaston, Count of Marsan	Marie Louise de Rohan	4 June 1736	1736	Third cousins	Charles I, Duke of Elbeuf
Gaston, Count of Eu	Isabel, Princess Imperial of Brazil	15 October 1864	1864	Second cousins	Ferdinand I of the Two Sicilies
Geoffrey II, Duke of Brittany	Constance, Duchess of Brittany	July 1181	1181	Half-second cousins; third cousins	Henry I of England; Malcolm III of Scotland
Georg, Duke of Saxe-Altenburg	Duchess Marie Louise of Mecklenburg-Schwerin	7 October 1825	1825	Half-third cousins once removed	Adolphus Frederick II, Duke of Mecklenburg-Strelitz
Georg II, Duke of Saxe-Meiningen	Princess Charlotte of Prussia (first wife)	18 May 1850	1850	Second cousins	Frederick William II of Prussia
Georg II, Duke of Saxe-Meiningen	Princess Feodora of Hohenlohe-Langenburg (second wife)	23 October 1858	1858	Second cousins	Christian Albrecht, Prince of Hohenlohe-Langenburg
Georg, Prince of Schaumburg-Lippe	Princess Marie Anne of Saxe-Altenburg	16 April 1882	1882	Fifth cousins	George II of Great Britain
Prince Georg of Bavaria	Archduchess Isabella of Austria	10 February 1912	1912	Third cousins once removed	Leopold II, Holy Roman Emperor
Georg Alexander, Duke of Mecklenburg	Archduchess Ilona of Austria	20 February 1946	1946	Fifth cousins once removed	Frederick II Eugene, Duke of Württemberg
Georg Donatus, Hereditary Grand Duke of Hesse	Princess Cecilie of Greece and Denmark	2 February 1931	1931	First cousins once removed	Louis IV, Grand Duke of Hesse
Georg Friedrich, Prince of Prussia	Princess Sophie of Isenburg	Potsdam, 25 August 2011	2011	Sixth cousin once-removed	Charles II, Grand Duke of Mecklenburg
George Plantagenet, 1st Duke of Clarence	Lady Isabel Neville	Calais, France, 11 July 1469	1469	First cousins once removed	Ralph de Neville, 1st Earl of Westmorland and Joan Beaufort
George I of Greece	Olga Constantinovna of Russia	27 October 1867	1867	Fifth cousins once removed	George I of Great Britain
George I of Great Britain	Duchess Sophia Dorothea of Brunswick-Celle	22 November 1682	1682	First cousins	George, Duke of Brunswick-Lüneburg
George II of Great Britain	Caroline of Ansbach	22 August 1705	1705	Third cousins once removed	John George, Elector of Brandenburg
George II of Greece	Princess Elisabeth of Romania	Bucharest, 27 February 1921	1921	Second cousins	Queen Victoria
George II, Landgrave of Hesse-Darmstadt	Sophia Eleonore of Saxony	April 1, 1627	1627	Half-first cousins once removed	John George, Elector of Brandenburg
George III of the United Kingdom	Charlotte of Mecklenburg-Strelitz	08 Sept 1761	1761	Second cousins twice removed; third cousins	Adolf Frederick I, Duke of Mecklenburg; Ernest I, Duke of Saxe-Gotha
George IV of the United Kingdom	Princess Caroline of Brunswick-Wolfenbüttel	Chapel Royal, St. James's Palace, 8 April 1795	1795	First cousins	Frederick, Prince of Wales and Princess Augusta of Saxe-Gotha-Altenburg
George V of the United Kingdom	Princess Mary of Teck	Chapel Royal, St. James's Palace, 6 July 1893	1893	Double second cousins once removed	George III of the United Kingdom; Landgrave Frederick III of Hesse-Kassel
George V of Hanover	Marie of Saxe-Altenburg	18 February 1843	1843	First cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
George VI of the United Kingdom	Elizabeth Bowes-Lyon	26 April 1923	1923	13th cousins	Henry VII of England
George, King of Saxony	Infanta Maria Anna of Portugal	11 May 1859	1859	Third cousins once removed	Francis I, Holy Roman Emperor and Maria Theresa of Austria
George, Duke of Saxony	Barbara Jagiellon	21 November 1496	1496	Second cousins twice removed	Algirdas
George, Grand Duke of Mecklenburg-Strelitz	Princess Marie of Hesse-Kassel	12 August 1817	1817	Fourth cousins	Albert II, Margrave of Brandenburg-Ansbach
Prince George, Duke of Kent	Princess Marina of Greece and Denmark	Westminster Abbey 29 November 1934	1934	Second cousins	Christian IX of Denmark
George Maximilianovich, 6th Duke of Leuchtenberg	Duchess Therese Petrovna of Oldenburg	12 May 1879	1879	Second cousins	Paul I of Russia
Grand Duke George Mikhailovich of Russia	Princess Maria of Greece and Denmark	30 April 1900	1900	First cousins once removed	Nicholas I of Russia
George Victor, Prince of Waldeck and Pyrmont	Princess Helena of Nassau (first wife)	26 September 1853	1853	Second cousins	Charles Christian, Prince of Nassau-Weilburg
George Victor, Prince of Waldeck and Pyrmont	Princess Louise of Schleswig-Holstein-Sonderburg-Glücksburg (second wife)	29 April 1891	1891	First cousins once removed	George I, Prince of Waldeck and Pyrmont
Prince George William of Hesse-Darmstadt	Countess Maria Louise Albertine of Leiningen-Falkenburg-Dagsburg	16 March 1748	1748	Third cousins	Christian I, Count Palatine of Birkenfeld-Bischweiler
Gian Galeazzo Visconti, Duke of Milan	Caterina Visconti	Church of San Giovanni in Conca, 2 October 1380	1380	First cousins	Stefano Visconti
Gottfried, Prince of Hohenlohe-Langenburg	Princess Margarita of Greece and Denmark	20 April 1931	1931	Second cousins once removed (through Queen Victoria); third cousins (through Nicholas I of Russia)	Queen Victoria; Nicholas I of Russia
Archduke Gottfried of Austria	Princess Dorothea of Bavaria	2 August 1938	1938	Second cousins once removed	Leopold II, Grand Duke of Tuscany
Prince Guillaume of Luxembourg	Princess Sibilla of Luxembourg	8 September 1994	1994	Fifth cousins once removed	Charles IV of Spain; Francis I of the Two Sicilies; Francis, Duke of Saxe-Coburg-Saalfeld; Frederick William, Prince of Nassau-Weilburg
Gustaf V of Sweden	Victoria of Baden	20 September 1881	1881	Third cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Gustaf VI Adolf of Sweden	Princess Margaret of Connaught (first wife)	15 June 1905	1905	Third cousins	Frederick William III of Prussia
Gustaf VI Adolf of Sweden	Louise Mountbatten (second wife)	3 November 1923	1923	Fourth cousins	Frederick William II of Prussia
Prince Gustaf Adolf, Duke of Västerbotten	Princess Sibylla of Saxe-Coburg and Gotha	20 October 1932	1932	Second cousins	Queen Victoria
Gustav III of Sweden	Sophia Magdalena of Denmark	1 October 1766	1766	Second cousins	George I of Great Britain
Gustav, Prince of Vasa	Princess Louise Amelie of Baden	9 November 1830	1830	First cousins	Charles Louis, Hereditary Prince of Baden
Gustavus Adolphus of Sweden	Maria Eleonora of Brandenburg	25 November 1620	1620	Third cousins once removed	Christian I of Denmark
Haakon VII of Norway	Princess Maud of Wales	Buckingham Palace, 22 July 1896	1896	First cousins	Christian IX of Denmark
Hadrian	Vibia Sabina	100	100	Second cousins once removed	Traianus
Hans-Adam I, Prince of Liechtenstein	Erdmuthe Maria Theresia of Dietrichstein	16 February 1681	1681	First cousins	Maximilian, Prince of Dietrichstein
Hans-Adam II, Prince of Liechtenstein	Marie Aglaë, Countess Kinsky von Wchinitz und Tettau	30 July 1967	1967	Second cousins once removed	Ferdinand Bonaventura, 7th Prince Kinsky of Wchinitz and Tettau
Prince Harald of Denmark	Princess Helena Adelaide of Schleswig-Holstein-Sonderburg-Glücksburg	28 April 1909	1909	Second cousins	Friedrich Wilhelm, Duke of Schleswig-Holstein-Sonderburg-Glücksburg
Prince Heinrich I Reuss of Köstritz	Duchess Woizlawa Feodora of Mecklenburg	15 September 1939	1939	Fourth cousins	Paul I of Russia
Heinrich XXII, Prince Reuss of Greiz	Princess Ida of Schaumburg-Lippe	8 October 1872	1872	Second cousins once removed	Charles Christian, Prince of Nassau-Weilburg
Heinrich XXVII, Prince Reuss Younger Line	Princess Elise of Hohenlohe-Langenburg	11 November 1884	1884	Third cousins	Frederick II Eugene, Duke of Württemberg
Prince Heinrich XXXIII Reuss of Köstritz	Princess Victoria Margaret of Prussia	17 May 1913	1913	Fourth cousins	Frederick William II of Prussia
Prince Heinrich XXXV Reuss of Köstritz (son of Heinrich VII, Prince Reuss of Köstritz)	Princess Maria of Saxe-Altenburg (daughter of Prince Albert of Saxe-Altenburg)	20 April 1911	1911	Second cousins once removed	Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach
Princess Helena of the United Kingdom	Prince Christian of Schleswig-Holstein	Windsor Castle, 5 July 1866	1866	Third cousins	Frederick, Prince of Wales
Henri, Count of Chambord	Archduchess Maria Theresa of Austria-Este	16 November 1846	1846	Second cousins	Victor Amadeus III of Sardinia
Henri d'Orléans, Duke of Aumale	Princess Maria Carolina of Bourbon-Two Sicilies	25 November 1844	1844	First cousins	Ferdinand I of the Two Sicilies
Henri, Count of Paris	Princess Isabelle of Orléans-Braganza	8 April 1931	1931	Double third cousins	Louis Philippe I; Pedro I of Brazil
Henri d'Orléans, Count of Paris	Duchess Marie Thérèse of Württemberg	5 July 1957	1957	Double fourth cousins	Louis Philippe I; Francis I of the Two Sicilies
Henri, Prince of Condé	Marie of Cleves, Princess of Condé (first wife)	1572	1572	First cousins	Charles, Duke of Vendôme
Henri, Prince of Condé	Charlotte Catherine de La Trémoille (second wife)	6 March 1586	1586	Second cousins once removed	Guillaume, seigneur de Montmorency
Henri, Prince of Condé	Charlotte Marguerite de Montmorency	1609	1609	First cousins once removed	Anne de Montmorency
Henri Jules, Prince of Condé	Anne Henriette of Bavaria	11 December 1663	1663	Fourth cousins	Charles, Duke of Vendôme
Princess Henrietta Anne of England	Philippe I, Duke of Orléans	31 March 1661	1661	First cousins	Henry IV of France
Henry I, Duke of Guise	Catherine of Cleves	4 October 1570	1570	Second cousins	Francis, Count of Vendôme
Henry I of Castile	Mafalda of Portugal	1215	1215	Second cousins once removed	Ramon Berenguer III, Count of Barcelona and Douce I, Countess of Provence
Henry I of Navarre	Blanche of Artois	February 1269	1269	Double third cousins once removed	Theobald II, Count of Champagne; Alfonso VII of León
Henry I of England	Matilda of Scotland (first wife)	11 November 1100	1100	Seventh cousins	Alfred the Great
Henry I of England	Adeliza of Louvain (second wife)	24 January 1121	1121	Fourth cousins	Mathilde von Sachsen
Henry II of England	Eleanor of Aquitaine	18 May 1152	1152	Half-third cousins	Ermengarde of Anjou
Henry II, Duke of Lorraine	Catherine de Bourbon (first wife)	31 January 1599	1599	Second cousins once removed	Charles, Count of Angoulême
Henry II, Duke of Lorraine	Margherita Gonzaga, Duchess of Lorraine (second wife)	24 April 1606	1606	Third cousins	Philip I of Castile and Joanna of Castile
Henry III of England	Eleanor of Provence	14 January 1236	1236	Fourth cousins	Humbert II, Count of Savoy
Henry IV of England	Mary de Bohun (first wife)	27 July 1380	1380	Second cousins (through Henry, 3rd Earl of Lancaster); Third cousins (through Edward I of England	Henry, 3rd Earl of Lancaster; Edward I of England
Henry IV of England	Joan of Navarre (second wife)	7 February 1403	1403	Third cousins	Philip IV of France and Joan I of Navarre
Henry IV of France	Margaret of Valois (first wife)	Notre Dame Cathedral, 18 August 1572	1572	Second cousins	Charles, Count of Angoulême
Henry IV of France	Marie de' Medici (second wife)	17 December 1600	1600	Fourth cousins	Gaston IV, Count of Foix and Eleanor of Navarre
Henry IV of Castile	Blanche II of Navarre (first wife)	1440	1440	First cousins	Ferdinand I of Aragon
Henry IV of Castile	Joan of Portugal (second wife)	21 May 1455	1455	First cousins (though Ferdinand I of Aragon); second cousins (through John of Gaunt)	Ferdinand I of Aragon; John of Gaunt
Henry V of England	Catherine of Valois	2 June 1420	1420	Third cousins once removed	Charles, Count of Valois
Henry VI of England	Margaret of Anjou	Titchfield, Hampshire, 23 April 1445	1445	Third cousins	John II of France
Henry VII of England	Elizabeth of York	Westminster Abbey, 18 January 1486	1486	Third cousins	John of Gaunt, 1st Duke of Lancaster and Katherine de Roet
Henry VIII of England	Catherine of Aragon (first wife)	Greenwich Palace, 11 June 1509 (annulled 23 May 1533)	1509	Third cousins once removed (through John of Gaunt, 1st Duke of Lancaster); Double fourth cousins (through Peter of Castile)	John of Gaunt, 1st Duke of Lancaster; Peter of Castile
Henry VIII of England	Anne Boleyn (second wife)	Westminster Abbey, 25 January 1533 (annulled 17 May 1536)	1533	Seventh cousins once removed	Edward I of England
Henry VIII of England	Jane Seymour (third wife)	York Place, 30 May 1536	1536	Fifth cousins	Philippa, 5th Countess of Ulster
Henry VIII of England	Anne of Cleves (fourth wife)	Greenwich Palace, 6 January 1540 (annulled 9 July 1540)	1540	Ninth cousins	Edward I of England
Henry VIII of England	Catherine Howard (fifth wife)	Oatlands Palace, 28 July 1540 (annulled 23 November 1541)	1540	Seventh cousins once removed	Edward I of England
Henry VIII of England	Catherine Parr (sixth wife)	Hampton Court Palace, London, 12 July 1543	1543	Third cousins (through Sir Richard Wydeville); Third cousins once removed (through Lady Joan Beaufort) Double fourth cousins once removed (through Thomas Holland, 2nd Earl of Kent and John of Gaunt, 1st Duke of Lancaster)	Sir Richard Wydeville; Lady Joan Beaufort; Thomas Holland, 2nd Earl of Kent; John of Gaunt, 1st Duke of Lancaster
Henry the Young King	Margaret of France, Queen of England and Hungary	27 August 1172	1172	Fourth cousins	Robert I, Duke of Burgundy
Prince Henry of the Netherlands	Princess Amalia of Saxe-Weimar-Eisenach (first wife)	19 May 1853	1853	Fourth cousins	Frederick William I of Prussia
Prince Henry of the Netherlands	Princess Marie of Prussia (second wife)	23 August 1878	1878	First cousins twice removed (though Paul I of Russia); second cousins once removed (through Frederick William II of Prussia)	Paul I of Russia; Frederick William II of Prussia
Prince Henry, Count of Bardi	Princess Maria Luisa of Bourbon-Two Sicilies (first wife)	25 November 1873	1873	Half-first cousins once removed	Francis I of the Two Sicilies
Prince Henry, Count of Bardi	Infanta Adelgundes, Duchess of Guimarães (second wife)	15 October 1876	1876	Second cousins once removed	Charles IV of Spain
Henry, Duke of Villena	Infanta Catherine, Duchess of Villena	November 1418	1418	First cousins	John I of Castile
Prince Henry of Prussia	Princess Wilhelmina of Hesse-Kassel	25 June 1752	1752	Fourth cousins once removed	Louis V, Landgrave of Hesse-Darmstadt
Henry the Lion	Clementia of Zähringen (first wife)	1147	1147	Third cousins once removed	Bernard II, Duke of Saxony
Henry the Lion	Matilda of England, Duchess of Saxony (second wife)	1 February 1168	1168	Third cousins twice removed ;fourth cousins once removed	Baldwin IV, Count of Flanders; Richard II, Duke of Normandy
Henry Julius, Duke of Brunswick-Lüneburg	Dorothea of Saxony (first wife)	26 September 1585	1585	Third cousins	John Cicero, Elector of Brandenburg
Henry Julius, Duke of Brunswick-Lüneburg	Elizabeth of Denmark, Duchess of Brunswick-Wolfenbüttel (second wife)	19 April 1590	1590	Second cousins once removed	Joachim I Nestor, Elector of Brandenburg
Archduke Hubert Salvator of Austria	Princess Rosemary of Salm-Salm	25 November 1926	1926	Fourth cousins	Leopold II, Holy Roman Emperor
Prince Hubertus of Prussia	Princess Magdalena Reuss of Köstritz	5 June 1943	1943	Third cousins	Heinrich LXIII, Prince Reuss of Köstritz
Princess Iniga of Thurn and Taxis	Prince Eberhard von Urach (son of Wilhelm Karl, Duke of Urach)	18 May 1948	1948	Second cousins once removed	Duke Maximilian Joseph in Bavaria
Princess Irene of Hesse and by Rhine	Prince Henry of Prussia	24 May 1888	1888	First cousins	Queen Victoria
Princess Isabel Alfonsa of Bourbon-Two Sicilies	Jan Kanty Zamoyski	9 March 1929	1929	First cousins once removed	Prince Francis, Count of Trapani
Isabella I of Castile	Ferdinand II of Aragon	Palacio de los Vivero, Valladolid, 19 October 1469	1469	Second cousins	John I of Castile
Isabella II of Spain	Francis, Duke of Cádiz	10 October 1846	1846	Double first cousins	Charles IV of Spain and Princess Maria Luisa of Parma; Francis I of the Two Sicilies and Infanta María Isabella of Spain
Jacqueline, Countess of Hainaut	John, Duke of Touraine (first husband)	6 August 1415	1415	Second cousins	John II of France
Jacqueline, Countess of Hainaut	John IV, Duke of Brabant (second husband)	10 March 1418	1418	First cousins	Philip the Bold
Jacqueline, Countess of Hainaut	Humphrey, Duke of Gloucester (third husband)	15 October 1423	1423	Third cousins	William I, Count of Hainaut
Jacques of Savoy, Count of Romont	Marie of Luxembourg, Countess of Vendôme	1484	1484	Second cousins once removed^[70]	John I, Count of La Marche
James I of England	Anne of Denmark	Old Bishop's Palace in Oslo, 23 November 1589	1589	Third cousins once removed	Christian I of Denmark
James I of Scotland	Joan Beaufort, Queen of Scots	12 February 1424	1424	Fifth cousins once removed	John Fitzgeoffrey
James I of Aragon	Eleanor of Castile	1221	1221	Second cousins	Alfonso VII of León
James II of England	Anne Hyde (first wife)	3 September 1660	1660	Ninth cousins once removed	Eleanor of Lancaster
James II of England	Mary of Modena (second wife)	21 November 1673	1673	Third cousins once removed; Fourth cousins twice removed	Cosimo I de' Medici, Grand Duke of Tuscany; Philip I of Castile and Joanna of Castile
James II of Scotland	Mary of Guelders	3 July 1449	1449	Fourth cousins once removed	William I, Count of Hainaut
James II, Count of Urgell	Isabella of Aragon, Countess of Urgell	29 June 1407	1407	First cousins once removed	Alfonso IV of Aragon
James II of Aragon	Isabella of Castile, Queen of Aragon	1 December 1291	1291	First cousins once removed	James I of Aragon
James III of Majorca	Constance of Aragon, Queen of Majorca	24 September 1336	1336	Second cousins once removed	James I of Aragon
James III of Scotland	Margaret of Denmark, Queen of Scotland	July 1469	1469	Fifth cousins	Louis IV, Holy Roman Emperor
James IV of Scotland	Margaret Tudor	Holyrood Abbey, Edinburgh, 8 August 1503	1503	Third cousins	John Beaufort, 1st Earl of Somerset
James V of Scotland	Madeleine of Valois (first wife)	1 January 1537	1537	Third cousins once removed	Adolph I, Duke of Cleves
James V of Scotland	Mary of Guise (second wife)	May 18, 1538	1538	Third cousins	Arnold, Duke of Guelders
James Francis Edward Stuart	Maria Clementina Sobieska	3 September 1719	1719	Fourth cousins once removed	Ferdinand I, Holy Roman Emperor
Jean, Grand Duke of Luxembourg	Princess Joséphine Charlotte of Belgium	9 April 1953	1953	Second cousins once removed	Miguel I of Portugal
Prince Jean, Duke of Guise	Princess Isabelle of Orléans	30 October 1899	1899	First cousins	Ferdinand Philippe, Duke of Orléans
Prince Joachim of Prussia	Princess Marie-Auguste of Anhalt	11 March 1916	1916	Double fourth cousins	Frederick William II of Prussia; Charles II, Grand Duke of Mecklenburg-Strelitz
Joachim I Nestor, Elector of Brandenburg	Elizabeth of Denmark, Electress of Brandenburg	10 April 1502	1502	Double second cousins once removed	Frederick I, Elector of Brandenburg; Frederick I, Elector of Saxony
Joachim II Hector, Elector of Brandenburg	Magdalena of Saxony (first wife)	6 November 1524	1524	Second cousins once removed	Frederick II, Elector of Saxony
Joachim II Hector, Elector of Brandenburg	Hedwig Jagiellon, Electress of Brandenburg (second wife)	1 September 1535	1535	Second cousins once removed	Albert II of Germany
Joan of Acre	Gilbert de Clare, 7th Earl of Gloucester	30 April 1290	1290	Half-fifth cousins	Henry I of England
Joanna I of Naples	Andrew, Duke of Calabria (first husband)	26 September 1333	1333	Second cousins	Charles II of Naples
Joanna I of Naples	Louis I of Naples (second husband)	22 August 1347	1347	First cousins (through Charles, Count of Valois); first cousins once removed (through Charles II of Naples)	Charles, Count of Valois; Charles II of Naples
Joanna I of Naples	James IV of Majorca (third husband)	September 26, 1363	1363	Second cousins once removed	Peter III of Aragon
João I, Duke of Braganza	Catherine, Duchess of Braganza	1563	1563	First cousins	Jaime, Duke of Braganza
João of Braganza, Marquis of Montemor-o-Novo	Isabel of Noronha	25 July 1460	1460	Half-third cousins	Peter I of Portugal
Prince Johann von Nepomuk of Thurn and Taxis (father of Prince Friedrich of Thurn and Taxis)	Princess Maria Julia of Lobkowicz			Second cousins	Ferdinand Bonaventura, 7th Prince Kinsky of Wchinitz and Tettau
Prince Johann Georg of Hohenzollern	Princess Birgitta of Sweden	25 May 1961	1961	Fifth cousins	Francis, Duke of Saxe-Coburg-Saalfeld
Prince Johann Georg of Saxony	Duchess Maria Isabella of Württemberg (first wife)	5 April 1894	1894	Double third cousins once removed	Leopold II, Holy Roman Emperor; Ferdinand I of the Two Sicilies
Prince Johann Georg of Saxony	Princess Maria Immaculata of Bourbon-Two Sicilies (second wife)	30 October 1906	1906	Double third cousins once removed	Leopold II, Holy Roman Emperor; Charles IV of Spain
Johann Nepomuk Karl, Prince of Liechtenstein	Countess Maria Josepha of Harrach-Rohrau	19 March 1744	1744	First cousins	Anton Florian, Prince of Liechtenstein
Johann Wilhelm, Elector Palatine	Archduchess Maria Anna Josepha of Austria (first wife)	25 October 1678	1678	Second cousins	William V, Duke of Bavaria
Johann Wilhelm, Elector Palatine	Anna Maria Luisa de' Medici (second wife)	29 April 1691	1691	Third cousins once removed	Albert V, Duke of Bavaria
Prince Johannes Heinrich of Saxe-Coburg and Gotha	Princess Mathilde of Saxony	12 November 1968	1968	Third cousins	Leopold II, Grand Duke of Tuscany
John, King of Denmark	Christina of Saxony	6 September 1478	1478	Fourth cousins	Stephen II, Duke of Bavaria
John, King of England	Isabella, Countess of Gloucester (first wife)	8 September 1176	1176	Half-second cousins	Henry II of England
John, King of England	Isabella of Angoulême (second wife)	24 August 1200	1200	Fourth cousins once removed	Roger de Montgomerie, 1st Earl of Shrewsbury
John I of Portugal	Philippa of Lancaster	11 February 1387	1387	Fourth cousins once removed	James I of Aragon
John I of Aragon	Martha of Armagnac (first wife)	24 June 1373	1373	Fourth cousins once removed	Louis VIII of France
John I of Aragon	Violant of Bar (second wife)	2 February 1380	1380	Third cousins once removed	Charles II of Naples
John I of Castile	Eleanor of Aragon, Queen of Castile (first wife)	18 June 1375	1375	Third cousins once removed	Peter III of Aragon
John I of Castile	Beatrice of Portugal (second wife)	14 May 1383	1383	Second cousins once removed	Manuel of Castile
John I, Count of Holland	Elizabeth of Rhuddlan	8 January 1297	1297	Third cousins twice removed	Henry II of England
John II of Portugal	Eleanor of Viseu	22 January 1470	1470	First cousins	Edward of Portugal
John II of Castile	Maria of Aragon, Queen of Castile (first wife)	1418	1418	First cousins	John I of Castile
John II of Castile	Isabella of Portugal, Queen of Castile (second wife)	22 July 1447	1447	First cousins once removed	John of Gaunt
John II of Aragon and Navarre	Blanche I of Navarre (first wife)	6 November 1419	1419	First cousins once removed	Henry II of Castile
John II of Aragon and Navarre	Juana Enríquez (second wife)	1 April 1444	1444	Second cousins once removed	Alfonso XI of Castile
John II, Marquess of Montferrat	Isabella of Majorca	4 September 1358	1358	Third cousins once removed	James I of Aragon
John II, Duke of Brabant	Margaret of England, Duchess of Brabant	8 July 1290	1290	Sixth cousins	William the Conqueror
John II, Duke of Brittany	Beatrice of England	22 January 1260	1260	Fourth cousins	Alfonso VII of León
John III of Portugal	Catherine of Austria	10 February 1525	1525	First cousins	Ferdinand II of Aragon and Isabella I of Castile
John IV, Marquess of Montferrat	Margaret of Savoy, Countess of Saint-Pol	December 1458	1458	Second cousins once removed	Amadeus VI, Count of Savoy
John IV, Duke of Brittany	Mary of Waltham (first wife)	3 July 1361	1361	Third cousins	Henry III of England
John IV, Duke of Brittany	Joan Holland, Duchess of Brittany (second wife)	May 1366	1366	Third cousins	Henry III of England
John IV, Duke of Brittany	Joan of Navarre, Queen of England (third wife)	2 October 1386	1386	Fourth cousins once removed	Theobald I of Navarre
John V Palaiologos, Byzantine Emperor	Helena Kantakouzene	Constantinople, 28 May 1347	1347	Second cousins	Michael VIII Palaiologos, Byzantine Emperor
John V of Portugal	Maria Anna of Austria	27 October 1708	1708	First cousins	Philip William, Elector Palatine
John VI of Portugal	Carlota of Spain	8 May 1785	1785	Second cousins	Philip V of Spain
John V, Count of Armagnac	Isabelle d'Armagnac, dame des Quatre-Vallées	c. 1450. Papal dispensation declared forged 1457^[71]	1450	Full siblings^[72]^[73]	John IV, Count of Armagnac
John of Gaunt, 1st Duke of Lancaster	Blanche of Lancaster (first wife)	Reading Abbey, Reading, Berkshire, 19 May 1359	1359	Third cousins	Henry III of England
John of Gaunt, 1st Duke of Lancaster	Infanta Constance of Castile (second wife)	Roquefort, 21 September 1371	1371	Third cousins twice removed	Ferdinand III of Castile
John of Lancaster, 1st Duke of Bedford	Anne of Burgundy	13 May 1423	1423	Fifth cousins	Philip III of France
John, Duke of Östergötland	Princess Maria Elizabeth of Sweden	29 November 1612	1612	First cousins	Gustav I of Sweden
John, Prince of Asturias	Margaret of Austria, Duchess of Savoy	20 January 1495	1495	Third cousins	John I of Portugal
John Adolf, Duke of Holstein-Gottorp	Augusta of Denmark	30 August 1596	1596	First cousins once removed	Frederick I of Denmark
Duke John Albert of Mecklenburg	Princess Elisabeth Sybille of Saxe-Weimar-Eisenach	6 November 1886	1886	Second cousins once removed	Paul I of Russia
John Casimir, Count Palatine of Kleeburg	Catherine of Sweden, Countess Palatine of Kleeburg	11 June 1615	1615	Second cousins	Philip I, Landgrave of Hesse
John Christian, Count Palatine of Sulzbach	Maria Henriette de La Tour d'Auvergne (first wife)	15 February 1722	1722	Fifth cousin once removed	William I, Count of Nassau-Dillenburg
John Christian, Count Palatine of Sulzbach	Landgravine Eleonore of Hesse-Rotenburg (second wife)	21 January 1731	1731	Third cousins	Maurice, Landgrave of Hesse-Kassel
John Frederick, Duke of Württemberg	Barbara Sophie of Brandenburg	5 November 1609	1609	Third cousins	Joachim I Nestor, Elector of Brandenburg
John Frederick II, Duke of Saxony	Agnes of Hesse	26 May 1555	1555	Third cousins	Frederick II, Elector of Saxony
John George I, Elector of Saxony	Duchess Magdalene Sibylle of Prussia	19 July 1607	1607	Third cousins	Joachim I Nestor, Elector of Brandenburg
John George II, Elector of Saxony	Margravine Magdalene Sibylle of Brandenburg-Bayreuth	13 November 1638	1638	Second cousins once removed	Joachim II Hector, Elector of Brandenburg
John George III, Elector of Saxony	Princess Anna Sophie of Denmark	9 October 1666	1666	Second cousins once removed	John George, Elector of Brandenburg
John Manuel, Prince of Portugal	Archduchess Joan of Austria	Lisbon, 20 January 1554	1554	Double first cousins	Philip I of Castile and Joanna of Castile; Manuel I of Portugal and Maria of Aragon
José, Prince of Brazil	Infanta Benedita of Portugal	21 February 1777	1777	First cousins^[74]	John V of Portugal
Joseph I of Portugal	Mariana Victoria of Spain	19 January 1729	1729	Second cousins; third cousins once removed	Philip William, Elector Palatine; Philip III of Spain
Joseph I, Holy Roman Emperor	Wilhelmine Amalia of Brunswick-Lüneburg	24 February 1699	1699	Fifth cousins twice removed	Christian I of Denmark
Joseph II, Holy Roman Emperor	Princess Isabella of Parma (first wife)	6 October 1760	1760	Third cousins once removed	Louis XIII of France
Joseph II, Holy Roman Emperor	Maria Josepha of Bavaria (second wife)	13 January 1765	1765	Second cousins	Leopold I, Holy Roman Emperor
Archduke Joseph August of Austria	Princess Auguste of Bavaria	15 November 1893	1893	Second cousins twice removed	Leopold II, Holy Roman Emperor
Archduke Joseph Francis of Austria	Princess Anna of Saxony	4 October 1926	1926	Half-second cousins once removed	Leopold II, Grand Duke of Tuscany
Joseph Johann Adam, Prince of Liechtenstein	Princess Maria Gabriele of Liechtenstein	1 December 1712	1712	Second cousins once removed	Prince Hartmann II of Liechtenstein
Archduke Joseph Karl of Austria	Princess Clotilde of Saxe-Coburg and Gotha	12 May 1864	1864	Second cousins once removed	Charles III of Spain
Joseph Wenzel I, Prince of Liechtenstein	Anna Maria of Liechtenstein	1718	1718	First cousins	Prince Hartmann III of Liechtenstein (son of Gundakar, Prince of Liechtenstein)
Josias, Hereditary Prince of Waldeck and Pyrmont	Duchess Altburg of Oldenburg	25 August 1922	1922	Third cousins	Victor II, Prince of Anhalt-Bernburg-Schaumburg-Hoym
Infante Juan, Count of Barcelona	Princess María de las Mercedes of Bourbon-Two Sicilies	12 October 1935	1935	Third cousins	Ferdinand VII of Spain
Juan, Count of Montizón	Archduchess Maria Beatrix of Austria-Este	6 February 1847	1847	Third cousins	Philip V of Spain
Juan Carlos I of Spain	Princess Sophia of Greece and Denmark	Church of Saint Dennis, Athens, 14 May 1962	1962	Third cousins, Third cousins once removed	Queen Victoria
Julia	Nero Caesar (first husband)	AD 20	0020	First cousins	Nero Claudius Drusus
Julia the Elder	Marcus Claudius Marcellus	Rome, 25 BC	-25	First cousins	Gaius Octavius and Atia Balba Caesonia
Julia the Younger	Lucius Aemilius Paullus	BC 5	BC 5	Half first cousins	Scribonia
Julia Drusilla	Marcus Aemilius Lepidus	November 37	37	First cousins	Marcus Vipsanius Agrippa and Julia the Elder
Karl, Duke of Schleswig-Holstein-Sonderburg-Glücksburg	Princess Vilhelmine Marie of Denmark	19 May 1838	1838	First cousins	Prince Charles of Hesse-Kassel
Karl, Prince of Leiningen	Grand Duchess Maria Kirillovna of Russia	25 November 1925	1925	Half-third cousins	Princess Victoria of Saxe-Coburg-Saalfeld
Prince Karl of Leiningen	Princess Marie Louise of Bulgaria	14 February 1957	1957	Fourth cousins once removed	Francis, Duke of Saxe-Coburg-Saalfeld
Prince Karl Alfred of Liechtenstein	Archduchess Agnes Christina of Austria	17 February 1949	1949	Second cousins once removed	Archduke Franz Karl of Austria
Prince Karl Anton of Hohenzollern	Princess Joséphine Caroline of Belgium	28 May 1894	1894	First cousins	Karl Anton, Prince of Hohenzollern
Karl Anton August, Prince of Schleswig-Holstein-Sonderburg-Beck	Countess Charlotte of Dohna-Schlodien	Königsberg, 30 May 1754	1754	First cousins	Frederick Louis, Duke of Schleswig-Holstein-Sonderburg-Beck
Karl August, Grand Duke of Saxe-Weimar-Eisenach	Landgravine Louise of Hesse-Darmstadt	3 October 1775	1775	Fifth cousins once removed	Johann II, Duke of Saxe-Weimar
Karl August, Prince of Waldeck and Pyrmont	Christiane Henriette, Countess Palatine of Zweibrücken	19 August 1741	1741	First cousins	Christian II, Count Palatine of Zweibrücken-Birkenfeld
Karl August, 10th Prince of Thurn and Taxis	Princess Maria Anna of Braganza	18 August 1921	1921	Fourth cousins	Charles III of Spain
Karl Georg August, Hereditary Prince of Brunswick-Wolfenbüttel	Princess Louise of Orange-Nassau	14 October 1790	1790	Double second cousins	George II of Great Britain; Frederick William I of Prussia
Archduke Karl Ludwig of Austria	Princess Margaretha of Saxony (first wife)	4 November 1856	1856	First cousins	Maximilian I Joseph of Bavaria
Archduke Karl Ludwig of Austria	Princess Maria Annunciata of Bourbon-Two Sicilies (second wife)	21 October 1862	1862	Second cousins	Leopold II, Holy Roman Emperor
Archduke Karl Ludwig of Austria	Infanta Maria Theresa of Portugal (third wife)	23 July 1873	1873	Third cousins	Charles III of Spain
Archduke Karl Salvator of Austria	Princess Maria Immaculata of Bourbon-Two Sicilies	19 September 1861	1861	First cousins	Francis I of the Two Sicilies
Karl Theodor, Duke in Bavaria	Princess Sophie of Saxony	11 February 1865	1865	First cousins	Maximilian I Joseph of Bavaria
Khalil of Bithynia	Irene Palaiologina (daughter of John V Palaiologos)	28 May 1347	1347	First cousins	John VI Kantakouzenos, Byzantine Emperor
Knud, Hereditary Prince of Denmark	Princess Caroline-Mathilde of Denmark	8 September 1933	1933	First cousins	Frederick VIII of Denmark
Prince Konrad of Bavaria	Princess Maria Bona of Savoy-Genoa	8 January 1921	1921	Second cousins	Ludwig I of Bavaria
Prince Konstantin of Bavaria	Princess Maria Adelgunde of Hohenzollern-Sigmaringen	26 August 1942	1942	Double fourth cousins	Maximilian I Joseph of Bavaria; Francis I of the Two Sicilies
Grand Duke Konstantin Konstantinovich of Russia	Princess Elisabeth of Saxe-Altenburg	27 April 1884	1884	Second cousins; second cousins once removed	Frederick, Duke of Saxe-Altenburg; Paul I of Russia
Grand Duke Konstantin Nikolayevich of Russia	Princess Alexandra of Saxe-Altenburg	11 September 1848	1848	Second cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Prince Leopold, Duke of Albany	Princess Helena of Waldeck and Pyrmont	St. George's Chapel, Windsor Castle, 27 April 1882	1882	Third cousins twice removed	Duke Charles Louis Frederick of Mecklenburg
Leopold I, Prince of Lippe	Princess Pauline of Anhalt-Bernburg	2 January 1796	1796	Second cousins once removed	Karl Frederick, Prince of Anhalt-Bernburg
Leopold I of Belgium	Princess Charlotte of Wales (first wife)	2 May 1816	1816	Fourth cousins	Frederick I, Duke of Saxe-Gotha-Altenburg
Leopold I of Belgium	Louise of Orléans (second wife)	9 August 1832	1832	Third cousins once removed	Louis Rudolph, Duke of Brunswick-Lüneburg
Leopold I, Holy Roman Emperor	Margarita Teresa of Spain (first wife)	Vienna, 12 December 1666	1666	First cousins^[70]	Philip III of Spain
Leopold I, Holy Roman Emperor	Claudia Felicitas of Austria (second wife)	15 October 1673	1673	Second cousins	Charles II, Archduke of Austria
Leopold I, Holy Roman Emperor	Eleonor Magdalene of Neuburg (third wife)	14 December 1676	1676	Second cousins	William V, Duke of Bavaria
Leopold II, Holy Roman Emperor	Maria Luisa of Spain	16 February 1764	1764	Second cousins once removed	Leopold I, Holy Roman Emperor
Leopold II, Grand Duke of Tuscany	Princess Maria Anna of Saxony (first wife)	16 November 1817	1817	Second cousins	Francis I, Holy Roman Emperor and Maria Theresa
Leopold II, Grand Duke of Tuscany	Princess Maria Antonia of the Two Sicilies (second wife)	Naples, 7 June 1833	1833	First cousins	Ferdinand I of the Two Sicilies
Leopold II of Belgium	Marie Henriette of Austria	22 August 1853	1853	Second cousins once removed	Charles III of Spain
Leopold III of Belgium	Astrid of Sweden	4 November 1926	1926	Half-third cousins once removed	Maximilian I Joseph of Bavaria
Leopold IV, Duke of Anhalt	Princess Frederica Wilhelmina of Prussia	18 April 1818	1818	Second cousins	Louis IX, Landgrave of Hesse-Darmstadt
Leopold V, Archduke of Austria	Claudia de' Medici	19 April 1626	1626	Second cousins twice removed	Philip I of Castile and Joanna of Castile
Leopold, Hereditary Prince of Anhalt	Princess Elisabeth of Hesse-Kassel	26 May 1884	1884	Third cousins	Frederick William II of Prussia
Leopold, Duke of Lorraine	Élisabeth Charlotte d'Orléans	13 October 1698	1698	Third cousins	Charles II, Archduke of Austria
Leopold, Prince of Salerno	Archduchess Clementina of Austria	28 July 1816	1816	First cousins once removed^[70]	Francis I, Holy Roman Emperor and Maria Theresa
Prince Leopold of Bavaria	Archduchess Gisela of Austria	20 April 1873	1873	Half-second cousins	Maximilian I Joseph of Bavaria
Archduke Leopold Salvator of Austria	Infanta Blanca of Spain	24 October 1889	1889	Half-second cousins once removed	Francis I of the Two Sicilies
Lionel of Antwerp, 1st Duke of Clarence	Elizabeth de Burgh, 4th Countess of Ulster (first wife)	Tower of London, 15 August 1352	1352	Third cousins once removed	Edward I of England
Prince Lorenz of Belgium, Archduke of Austria-Este	Princess Astrid of Belgium, Archduchess of Austria-Este	22 September 1984	1984	Third cousins once removed	Miguel I of Portugal
Louis I of Etruria	Maria Luisa, Duchess of Lucca	5 August 1795	1795	First cousins	Philip, Duke of Parma
Louis I of Spain	Louise Élisabeth d'Orléans	20 January 1722	1722	Half-first cousins once removed	Louis XIV of France
Louis I, Grand Duke of Hesse	Princess Louise of Hesse-Darmstadt	19 February 1777	1777	First cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Louis II, Grand Duke of Hesse	Princess Wilhelmine of Baden	19 June 1804	1804	First cousins	Louis IX, Landgrave of Hesse-Darmstadt
Louis II of Hungary	Mary of Austria	22 July 1515	1515	Half-second cousins once removed	John II of Aragon and Navarre
Louis III of Naples	Margaret of Savoy, Duchess of Anjou	31 Mar 1431	1431	Second cousins once removed	John II of France
Louis III, Grand Duke of Hesse	Princess Mathilde Caroline of Bavaria	26 December 1833	1833	Second cousins	Prince George William of Hesse-Darmstadt
Louis IV, Grand Duke of Hesse	Princess Alice of the United Kingdom	Osborne House, 1 July 1862	1862	Fourth cousins	Ferdinand Albert II, Duke of Brunswick-Wolfenbüttel
Louis VII of France	Eleanor of Aquitaine (first wife)	25 July 1137	1137	Third cousins once removed	Robert II of France
Louis VII of France	Constance of Castile (second wife)	1154	1154	Third cousins once removed	Robert II of France
Louis VII of France	Adela of Champagne (third wife)	18 October 1160	1160	Third cousins once removed	Robert II of France
Louis XI of France	Charlotte of Savoy	14 February 1451	1451	Third cousins	John II of France
Louis XII of France	Joan of France, Duchess of Berry (first wife)	8 September 1476	1476	Second cousins once removed	Charles V of France
Louis XII of France	Anne, Duchess of Brittany (second wife)	8 January 1499	1499	First cousins once removed	Louis I, Duke of Orléans
Louis XII of France	Mary Tudor, Queen of France (third wife)	9 October 1514	1514	Second cousins twice removed	Charles V of France
Louis XIII of France	Anne of Austria	24 November 1615	1615	Second cousins	Ferdinand I, Holy Roman Emperor
Louis XIV of France	Maria Theresa of Spain	Saint Jean-Baptiste Church, Saint-Jean-de-Luz, 9 June 1660	1660	Double first cousins	Henry IV of France and Marie de' Medici; Philip III of Spain and Margaret of Austria
Louis XVI of France	Archduchess Maria Antonia of Austria	Palace of Versailles, 16 May 1770	1770	Second cousins once removed	Leopold I, Holy Roman Emperor
Louis XVIII of France	Princess Marie Joséphine of Savoy	Palace of Versailles, 14 May 1771	1771	Double second cousins once removed	Louis, Dauphin of France and Duchess Maria Anna Victoria of Bavaria; Victor Amadeus II of Sardinia and Anne Marie d'Orléans
Prince Louis, Count of Aquila	Princess Januária of Brazil	28 April 1844	1844	First cousins once removed	Charles IV of Spain
Louis, Grand Dauphin	Duchess Maria Anna Victoria of Bavaria	28 January 1680	1680	Second cousins	Henry IV of France
Louis, Dauphin of France	Infanta Maria Teresa Rafaela of Spain (first wife)	18 December 1744	1744	First cousins once removed	Louis, Grand Dauphin
Louis, Dauphin of France	Maria Josepha of Saxony, Dauphine of France (second wife)	9 February 1747	1747	Fourth cousins once removed	Philip III of Spain
Louis of Cyprus	Charlotte, Queen of Cyprus	7 October 1459	1459	First cousins	Janus of Cyprus
Louis, Duke of Burgundy	Marie Adélaïde of Savoy	6 December 1697	1697	Double second cousins	Louis XIII of France; Victor Amadeus I, Duke of Savoy
Louis, Duke of Joyeuse	Marie Anne de Bourbon	1719	1719	Half-third cousins	Henry IV of France
Prince Louis, Duke of Nemours	Princess Victoria of Saxe-Coburg and Gotha	27 April 1840	1840	Fourth cousins	Louis Rudolph, Duke of Brunswick-Lüneburg
Louis d'Orléans, Duke of Orléans	Margravine Auguste of Baden-Baden	13 July 1724	1724	Half-fourth cousins	Philip II of Spain
Louis, Duke of Savoy	Anne of Cyprus	12 February 1434	1434	Third cousins once removed	Louis I, Duke of Bourbon
Louis, Duke of Württemberg	Princess Henriette of Nassau-Weilburg	28 January 1797	1797	Third cousins	George I of Great Britain
Louis, Prince of Condé	Louise Françoise de Bourbon, Duchess of Bourbon	25 May 1685	1685	Fourth cousins once removed	Charles, Duke of Vendôme
Louis Armand I, Prince of Conti	Marie Anne de Bourbon	16 January 1680	1680	Fourth cousins	Charles, Duke of Vendôme
Louis Armand II, Prince of Conti	Louise Élisabeth de Bourbon	9 July 1713	1713	First cousins	Henri Jules, Prince of Condé
Louis Auguste, Duke of Maine	Louise Bénédicte de Bourbon	19 May 1692	1692	Fourth cousins once removed	Charles, Duke of Vendôme
Prince Louis Charles of Prussia	Frederica of Mecklenburg-Strelitz	26 December 1793	1793	Second cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Louis Ferdinand, Prince of Prussia	Grand Duchess Kira Kirillovna of Russia	21 October 1938	1938	Second cousins once removed	Queen Victoria
Louis François, Prince of Conti	Louise Diane d'Orléans	21 January 1732	1732	First cousins once removed	Louis XIV of France
Louis François Joseph, Prince of Conti	Maria Fortunata d'Este	7 February 1759	1759	Second cousins	Louis XIV of France
Louis George, Margrave of Baden-Baden	Duchess Maria Anna Josepha of Bavaria	20 July 1755	1755	Third cousins once removed	Charles Emmanuel I, Duke of Savoy
Louis Henri, Prince of Condé	Bathilde d'Orléans	20 April 1770	1770	Second cousins	Louis, Prince of Condé
Louis Henri, Duke of Bourbon	Marie Anne de Bourbon	9 August 1713	1713	First cousins	Henri Jules, Prince of Condé
Louis Jean Marie de Bourbon, Duke of Penthièvre	Maria Teresa Felicitas d'Este	1744	1744	First cousins once removed	Louis XIV of France
Louis Joseph, Duke of Guise	Élisabeth Marguerite d'Orléans	15 May 1667	1667	Fifth cousins	René II, Duke of Lorraine
Louis Joseph, Duke of Vendôme	Marie Anne de Bourbon, Duchess of Vendôme	21 May 1710	1710	Fourth cousins once removed	Charles, Duke of Vendôme
Louis Philippe I	Maria Amalia of Naples and Sicily	25 November 1809	1809	Double third cousins once removed	Louis XIV of France; Philippe I, Duke of Orléans
Louis Philippe I, Duke of Orléans	Louise Henriette de Bourbon	17 December 1743	1743	Second cousins	Louis XIV of France
Louis Philippe II, Duke of Orléans	Louise Marie Adélaïde de Bourbon	Palace of Versailles, 5 April 1769	1769	Second cousins	Philippe II, Duke of Orléans
Louise, Princess Royal	Alexander Duff, 1st Duke of Fife	Buckingham Palace, 27 July 1889	1889	Third cousins	George III of the United Kingdom
Lucius Aelius	Avidia Plautia	Before 130	130	First cousins
Ludwig I of Bavaria	Therese of Saxe-Hildburghausen	12 October 1810	1810	First cousins once removed	Prince George William of Hesse-Darmstadt
Ludwig III of Bavaria	Maria Theresa of Austria-Este	February 20, 1868	1868	Second cousins once removed	Leopold II, Holy Roman Emperor
Prince Ludwig of Bavaria	Princess Irmingard of Bavaria	July 20, 1950	1950	First cousins	Ludwig III of Bavaria
Prince Ludwig August of Saxe-Coburg and Gotha	Princess Leopoldina of Brazil	15 December 1864	1864	Second cousins	Ferdinand I of the Two Sicilies
Prince Ludwig Gaston of Saxe-Coburg and Gotha	Princess Mathilde of Bavaria	1 May 1900	1900	Second cousins twice removed	Leopold II, Holy Roman Emperor
Prince Ludwig Ferdinand of Bavaria	Infanta María de la Paz of Spain	April 2, 1883	1883	First cousins	Infante Francisco de Paula of Spain
Prince Ludwig Philipp of Thurn and Taxis	Princess Elisabeth of Luxembourg	14 November 1922	1922	Fourth cousins	Charles II, Grand Duke of Mecklenburg-Strelitz
Luís I of Portugal	Maria Pia of Savoy	6 October 1862	1862	Second cousins once removed	Leopold II, Holy Roman Emperor
Prince Luís of Orléans-Braganza	Princess Maria di Grazia of Bourbon-Two Sicilies	4 November 1908	1908	Second cousins	Francis I of the Two Sicilies
Count Luitpold of Castell-Castell	Princess Alexandrine-Louise of Denmark	22 January 1937	1937	Fifth cousins	Frederick II, Landgrave of Hesse-Kassel
Magnus III of Mecklenburg-Schwerin	Elizabeth of Denmark, Duchess of Mecklenburg	26 August 1543	1543	Third cousins	Frederick I, Elector of Brandenburg
Manuel I of Portugal	Isabella, Princess of Asturias (first wife)	Estremoz, 3 November 1490	1490	Second cousins	Ferdinand I of Aragon; John of Gaunt, 1st Duke of Lancaster
Manuel I of Portugal	Maria of Aragon (second wife)	Alcazar de Sal, 30 October 1500	1500	Second cousins	Ferdinand I of Aragon; John of Gaunt, 1st Duke of Lancaster
Manuel I of Portugal	Eleanor of Austria (third wife)	16 July 1518	1518	Second cousins once removed	Ferdinand I of Aragon; John of Gaunt, 1st Duke of Lancaster
Manuel II of Portugal	Princess Augusta Victoria of Hohenzollern	4 September 1913	1913	Third cousins	Prince Ferdinand of Saxe-Coburg and Gotha and Princess Maria Antonia Koháry de Csábrág et Szitnya
Manuel of Castile	Constance of Aragon, Lady of Villena	1260	1260	Third cousins	Alfonso VII of León
Marcus Aurelius, Emperor of Rome	Faustina the Younger	13 May 145	145	First cousins	Marcus Annius Verus and Rupilia
Marcus Valerius Messalla Barbatus	Domitia Lepida the Younger	15	15	Half first cousins	Octavia the Younger
Margaret, Countess of Pembroke	John Hastings, 2nd Earl of Pembroke	19 May 1359	1359	Half-fourth cousins once removed	Isabella of Angoulême
Maria of Portugal, Lady of Meneses and Orduña	Fernando Díaz de Haro, Lord of Orduña and Balmaseda	1315	1315	Half-first cousins once removed	Alfonso X of Castile
Maria of Portugal, Marchioness of Tortosa	Infante Fernando, Marquis of Tortosa	1354	1354	Second cousins	Sancho IV of Castile
Maria I of Portugal	Peter III of Portugal	6 June 1760	1760	Second cousins once removed^[70]	Philip William, Elector Palatine
Maria II of Portugal	Ferdinand II of Portugal	1 January 1836	1836	Fourth cousins once removed	Louis Rudolph, Duke of Brunswick-Lüneburg
Princess Maria de los Dolores of Bourbon-Two Sicilies	Augustyn Józef Czartoryski	12 August 1937	1937	Third cousins	Louis Philippe I
Princess Maria Cristina of Savoy-Aosta	Prince Casimir of Bourbon-Two Sicilies	29 January 1967	1967	Third cousins twice removed	Francis I of the Two Sicilies
Princess Maria Francesca of Savoy	Prince Luigi of Bourbon-Parma	23 January 1939	1939	Fourth cousins	Leopold II, Holy Roman Emperor
Maria Vladimirovna, Grand Duchess of Russia	Prince Franz Wilhelm of Prussia	4 September 1976	1976	Third cousins once removed	Queen Victoria
Princess Marie of Orléans	Prince Gundakar of Liechtenstein	22 July 1989	1989	Fifth cousins	Maximilian I Joseph of Bavaria
Marie de Bourbon, Duchesse d'Estouteville (daughter of Francis de Bourbon, Count of St. Pol)	Jean, Count of Soissons and Enghien (son of Charles, Duke of Vendôme)			First cousins	Francis, Count of Vendôme
Princess Marie Adelheid of Lippe	Prince Heinrich XXXII Reuss of Köstritz (first husband)	19 May 1920	1920	Fourth cousins	Frederick William II of Prussia
Princess Marie Adelheid of Lippe	Prince Heinrich XXXV Reuss of Köstritz (second husband)	12 April 1921	1921	Fourth cousins	Frederick William II of Prussia
Princess Marie Thérèse of France	Louis Antoine, Duke of Angoulême	Mittau, Courland, 10 June 1799	1799	First cousins	Louis, Dauphin of France
Martin of Aragon	Margaret of Prades	17 September 1409	1409	Second cousins once removed	James II of Aragon
Martin I of Sicily	Maria, Queen of Sicily	February, 1392	1392	First cousins	Peter IV of Aragon
Mary, Queen of Scots	Francis II of France (first husband)	24 April 1558	1558	Second cousins	Jean VIII, Count of Vendôme
Mary, Queen of Scots	Henry Stuart, Lord Darnley (second husband)	Chapel-Royal, Palace of Holyroodhouse, Edinburgh, 9 July 1565	1565	Half-first cousins	Margaret Tudor
Mary, Queen of Scots	James Hepburn, 4th Earl of Bothwell (third husband)	Great Hall, Holyrood Palace, Edinburgh, 15 May 1567	1567	Half-third cousins once removed	Lady Joan Beaufort
Empress Matilda	Henry V, Holy Roman Emperor (first husband)	January 1114	1114	Second cousins twice removed	Gisela of Swabia
Empress Matilda	Geoffrey Plantagenet, Count of Anjou (second husband)	1128	1128	Fourth cousins once removed	Richard I of Normandy
Matthew, Count of Boulogne	Marie I, Countess of Boulogne	1160	1160	Third cousins	Baldwin V, Count of Flanders
Matthew, Count of Foix	Joanna of Aragon, Countess of Foix	4 June 1392	1392	Half-fourth cousins	Peter III of Aragon
Matthias, Holy Roman Emperor	Anna of Tyrol	4 December 1611	1611	First cousins	Ferdinand I, Holy Roman Emperor
Maurice, Elector of Saxony	Agnes of Hesse	9 January 1541	1541	First cousins once removed	Albert III, Duke of Saxony
Prince Maurice of Savoy	Princess Luisa Cristina of Savoy	8 August 1642	1642	Third cousins once removed^[70]	Philip I of Castile and Joanna of Castile
Maximilian I, Holy Roman Emperor	Mary, Duchess of Burgundy (first wife)	Ghent, 18 August 1477	1477	Second cousins	John I of Portugal
Maximilian I, Holy Roman Emperor	Anne of Brittany (second wife)	19 December 1490	1490	Second cousins once removed	Ferdinand I of Aragon
Maximilian I of Mexico	Princess Charlotte of Belgium	Brussels, 27 July 1857	1857	Second cousins	Ferdinand I of the Two Sicilies
Maximilian I, Elector of Bavaria	Elisabeth of Lorraine (first wife)	9 February 1595	1595	First cousins	Francis I, Duke of Lorraine
Maximilian I, Elector of Bavaria	Archduchess Maria Anna of Austria (second wife)	15 July 1635	1635	Second cousins^[70]	Ferdinand I, Holy Roman Emperor
Maximilian I Joseph of Bavaria	Princess Augusta Wilhelmine of Hesse-Darmstadt (first wife)	30 September 1785	1785	Fourth cousins	George II, Landgrave of Hesse-Darmstadt
Maximilian I Joseph of Bavaria	Caroline of Baden (second wife)	9 March 1797	1797	Fourth cousins once removed	George II, Landgrave of Hesse-Darmstadt
Maximilian II, Holy Roman Emperor	Maria of Spain	13 September 1548	1548	First cousins	Philip I of Castile and Joanna of Castile
Maximilian II Emanuel, Elector of Bavaria	Maria Antonia of Austria	15 July 1685	1685	Second cousins	Ferdinand II, Holy Roman Emperor
Maximilian II of Bavaria	Marie of Prussia	12 October 1842	1842	Third cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Maximilian III Joseph, Elector of Bavaria	Maria Anna Sophia of Saxony	9 July 1747	1747	First cousins	Joseph I, Holy Roman Emperor
Prince Maximilian of Baden	Princess Marie Louise of Hanover	10 July 1900	1900	Fourth cousins	Frederick V of Denmark
Maximilian, Hereditary Prince of Saxony	Princess Carolina of Parma (first wife)	22 April 1792	1792	Third cousins once removed	Leopold I, Holy Roman Emperor
Maximilian, Hereditary Prince of Saxony	Princess Maria Luisa Carlota of Parma (second wife)	15 October 1825	1825	Third cousins once removed	Leopold I, Holy Roman Emperor
Maximilian de Beauharnais, 3rd Duke of Leuchtenberg	Grand Duchess Maria Nikolaevna of Russia	2 July 1839	1839	Second cousins once removed	Prince George William of Hesse-Darmstadt
Maximilian Anton, Hereditary Prince of Thurn and Taxis	Duchess Helene in Bavaria	24 August 1858	1858	Fourth cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Duke Maximilian Joseph in Bavaria	Princess Ludovika of Bavaria	September 9, 1828	1828	First cousins once removed	Frederick Michael, Count Palatine of Zweibrücken
Michael of Romania	Princess Anne of Bourbon-Parma	Athens, 10 June 1948	1948	Second cousins once removed	Christian IX of Denmark
Grand Duke Michael Mikhailovich of Russia	Sophie of Merenberg	10 March 1891	1891	Third cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Grand Duke Michael Nikolaevich of Russia	Olga Feodorovna of Baden	28 August 1857	1857	Third cousins	Louis IX, Landgrave of Hesse-Darmstadt
Grand Duke Michael Pavlovich of Russia	Princess Charlotte of Württemberg	19 February 1824	1824	First cousins once removed	Frederick II Eugene, Duke of Württemberg
Archduchess Michaela of Austria	Count Hubertus von Kageneck	22 October 1994	1994	Fourth cousins once removed	Charles IV of Spain
Prince Michel of Bourbon-Parma	Princess Maria Pia of Savoy	2003	2003	Second cousins once removed	Miguel I of Portugal
Michel, 14th Prince of Ligne	Princess Eleonora of Orléans-Braganza	10 March 1981	1981	Fourth cousins once removed	John VI of Portugal
Miguel, Duke of Braganza	Princess Maria Theresa of Löwenstein-Wertheim-Rosenberg	Kleinheubach, 8 November 1893	1893	First cousins	Constantine, Hereditary Prince of Löwenstein-Wertheim-Rosenberg
Prince Moritz of Saxe-Altenburg	Princess Augusta of Saxe-Meiningen	15 October 1862	1862	Fourth cousins	Louis VIII, Landgrave of Hesse-Darmstadt
Princess Nadezhda of Bulgaria	Duke Albrecht Eugen of Württemberg	24 January 1924	1924	Second cousins	Ferdinand II of the Two Sicilies
Napoleon Louis Bonaparte	Charlotte Napoléone Bonaparte	1823?	1823	First cousins	Carlo Buonaparte
Nero, Emperor of Rome	Claudia Octavia	Rome, 9 June AD 53	0053	Double first cousins once removed	Lucius Domitius Ahenobarbus and Antonia Major; Nero Claudius Drusus and Antonia Minor
Nicholas I of Russia	Princess Charlotte of Prussia	Chapel of the Winter Palace, 13 July 1817	1817	Third cousins	Frederick William I of Prussia
Nicholas II of Russia	Princess Alix of Hesse and by Rhine	Grand Church of the Winter Palace, Winter Palace, Saint Petersburg, 26 November 1894	1894	Second cousins	Louis II, Grand Duke of Hesse and by Rhine
Grand Duke Nicholas Nikolaevich of Russia	Duchess Alexandra Petrovna of Oldenburg	6 February 1856	1856	First cousins once removed	Paul I of Russia
Prince Nicholas of Greece and Denmark	Grand Duchess Elena Vladimirovna of Russia	29 August 1902	1902	Second cousins	Nicholas I of Russia
Nicholas Francis, Duke of Lorraine	Claude Françoise de Lorraine	18 February 1634	1634	First cousins	Charles III, Duke of Lorraine
Prince Nikolaus of Liechtenstein	Princess Margaretha of Luxembourg	20 March 1982	1982	Third cousins	Miguel I of Portugal
Nikolaus, Hereditary Grand Duke of Oldenburg	Princess Helena of Waldeck and Pyrmont	26 October 1921	1921	Third cousins	Victor II, Prince of Anhalt-Bernburg-Schaumburg-Hoym
Odo III, Duke of Burgundy	Theresa of Portugal, Countess of Flanders	1193	1193	Second cousins twice removed	Henry, son of Robert I of Burgundy
Odoardo Farnese, Duke of Parma	Margherita de' Medici	1628	1628	Third cousins once removed	Philip I of Castile and Joanna of Castile
Olav V of Norway	Princess Märtha of Sweden	Oslo Cathedral, 21 March 1929	1929	First cousins	Frederick VIII of Denmark
Duchess Olga of Württemberg	Prince Maximilian of Schaumburg-Lippe	3 November 1898	1898	First cousins once removed	George William, Prince of Schaumburg-Lippe
Oscar II of Sweden	Sophia of Nassau	6 June 1857	1857	Third cousins once removed	Prince George William of Hesse-Darmstadt
Archduke Otto of Austria	Princess Maria Josepha of Saxony	2 October 1886	1886	Second cousins; second cousins once removed	Maximilian I Joseph of Bavaria; Francis II, Holy Roman Emperor
Archduke Otto of Austria	Princess Regina of Saxe-Meiningen	10 May 1951	1951	Fourth cousins	Karl Ludwig, Prince of Hohenlohe-Langenburg
Paul of Greece	Princess Frederica of Hanover	Athens, 9 January 1938	1938	First cousins once removed (through Frederick III, German Emperor and Victoria, Princess Royal); Second cousins (through Christian IX of Denmark)	Frederick III, German Emperor and Victoria, Princess Royal; Christian IX of Denmark
Prince Paul of Württemberg	Princess Charlotte of Saxe-Hildburghausen	28 September 1805	1805	Fifth cousins	Ernest I, Duke of Saxe-Gotha
Grand Duke Paul Alexandrovich of Russia	Grand Duchess Alexandra Georgievna of Russia	17 June 1889	1889	First cousins once removed	Nicholas I of Russia
Paul Frederick, Grand Duke of Mecklenburg-Schwerin	Princess Alexandrine of Prussia	25 May 1822	1822	Fourth cousins once removed	Adolf Frederick I, Duke of Mecklenburg
Duke Paul Frederick of Mecklenburg	Princess Marie of Windisch-Graetz	5 May 1881	1881	First cousins	Paul Frederick, Grand Duke of Mecklenburg-Schwerin
Duke Paul Wilhelm of Württemberg	Princess Maria Sophia of Thurn and Taxis	17 April 1827	1827	Third cousins	Anselm Franz, 2nd Prince of Thurn and Taxis
Pedro I of Brazil	Archduchess Maria Leopoldina of Austria (first wife)	1817	1817	Second cousins	Charles III of Spain
Pedro II of Brazil	Teresa Cristina of the Two Sicilies	30 May 1843	1843	Double first cousins once removed	Ferdinand I of the Two Sicilies; Charles IV of Spain
Infante Pedro Carlos of Spain and Portugal	Maria Teresa, Princess of Beira	13 May 1810	1810	First cousins (through Maria I of Portugal and Peter III of Portugal); first cousins once removed (through Charles III of Spain)	Maria I of Portugal and Peter III of Portugal; Charles III of Spain
Prince Pedro Gastão of Orléans-Braganza	Princess Maria de la Esperanza of Bourbon-Two Sicilies	18 December 1944	1944	Double third cousins	Francis I of the Two Sicilies; Louis Philippe I
Prince Pedro Henrique of Orléans-Braganza	Princess Maria Elisabeth of Bavaria	19 August 1937	1937	Third cousins	Leopold II, Grand Duke of Tuscany
Peter I of Portugal	Constanza Manuel (first wife)	24 August 1339	1339	Second cousins once removed	Ferdinand III of Castile
Peter I of Portugal	Inês de Castro (second wife)	1346	1346	Half-first cousins once removed	Sancho IV of Castile
Peter I, Grand Duke of Oldenburg	Duchess Frederica of Württemberg	6 June 1781	1781	Fourth cousins once removed; fifth cousins twice removed	George, Duke of Brunswick-Lüneburg; Frederick II of Denmark
Peter II of Yugoslavia	Alexandra of Yugoslavia	20 March 1944	1944	Third cousins	Queen Victoria
Peter II, Grand Duke of Oldenburg	Princess Elisabeth of Saxe-Altenburg	10 February 1852	1852	Double second cousins	Frederick II Eugene, Duke of Württemberg; Charles Christian, Prince of Nassau-Weilburg
Peter II of Aragon	Maria of Montpellier	June 15, 1204	1204	Fourth cousins once removed	Robert I, Duke of Burgundy
Peter IV of Aragon	Maria of Navarre (first wife)	23 July 1338	1338	Fourth cousins	Louis VIII of France
Peter IV of Aragon	Eleanor of Portugal, Queen of Aragon (second wife)	15 November 1347	1347	Second cousins	Peter III of Aragon
Peter IV of Aragon	Eleanor of Sicily (third wife)	27 August 1349	1349	Double second cousins	Peter III of Aragon; Charles II of Naples
Peter, Duke of Coimbra	Isabella of Urgell, Duchess of Coimbra	13 September 1428	1428	Fourth cousins	Peter III of Aragon
Peter, Duke of Schleswig-Holstein	Princess Marie Alix of Schaumburg-Lippe	9 October 1947	1947	Third cousins	George William, Prince of Schaumburg-Lippe
Duke Peter Alexandrovich of Oldenburg	Grand Duchess Olga Alexandrovna of Russia	9 August 1901	1901	Second cousins	Nicholas I of Russia
Duke Peter Georgievich of Oldenburg	Princess Therese of Nassau-Weilburg	23 April 1837	1837	Fifth cousins	George I of Great Britain
Archduke Peter Ferdinand of Austria	Princess Maria Cristina of Bourbon-Two Sicilies	8 November 1900	1900	First cousins once removed (through Leopold II, Grand Duke of Tuscany); second cousins (through Francis I of the Two Sicilies)	Leopold II, Grand Duke of Tuscany; Francis I of the Two Sicilies
Philibert, Margrave of Baden-Baden	Mechthild of Bavaria	17 January 1557	1557	Third cousins	Ernest, Duke of Austria
Philibert I, Duke of Savoy	Bianca Maria Sforza	6 January 1474	1471	First cousins	Louis, Duke of Savoy
Philibert II, Duke of Savoy	Yolande Louise of Savoy (first wife)	1496	1496	First cousins once removed	Louis, Duke of Savoy
Philibert II, Duke of Savoy	Margaret of Austria, Duchess of Savoy (second wife)	1501	1501	Second cousins once removed	John the Fearless
Philippa, 5th Countess of Ulster	Edmund Mortimer, 3rd Earl of March	Reading Abbey, 1368	1368	Third cousins once removed	Richard de Clare, 6th Earl of Gloucester
Philip the Good, Duke of Burgundy	Michelle of Valois (first wife)	June 1409	1409	Second cousins	John II of France
Philip the Good, Duke of Burgundy	Bonne of Artois (second wife)	20 June 1413	1413	Second cousins	John II of France
Philip the Good, Duke of Burgundy	Isabella of Portugal (third wife)	Bruges, 7 January 1430	1430	Third cousins	William I, Count of Hainaut
Philip, Duke of Parma	Louise Élisabeth of France	26 August 1739	1739	First cousins once removed	Louis, Grand Dauphin
Philip I, Count of Boulogne	Matilda II, Countess of Boulogne	1223	1223	Third cousins	Stephen, Count of Blois
Philip I, Landgrave of Hesse	Christine of Saxony	11 December 1523	1523	Third cousins	Frederick I, Elector of Saxony
Philip I of Castile	Joanna of Castile	20 October 1496	1496	Third cousins	John I of Portugal
Philip II of Spain	Maria Manuela, Princess of Portugal (first wife)	15 November 1543	1543	Double first cousins	Philip I of Castile and Joanna of Castile; Manuel I of Portugal and Maria of Aragon
Philip II of Spain	Mary I of England (second wife)	Winchester Cathedral, 25 July 1554	1554	First Cousins once removed	Ferdinand II of Aragon and Isabella I of Castile
Philip II of Spain	Elisabeth of Valois (third wife)	22 June 1559	1559	Fourth cousins	Charles I, Duke of Bourbon
Philip II of Spain	Anna of Austria, Queen of Spain (fourth wife)	4 May 1570	1570	First cousins once removed^[70]	Philip I of Castile and Joanna of Castile
Philip II, Duke of Savoy	Margaret of Bourbon	6 April 1472	1472	Second cousins	Philip the Bold
Philip III of France	Isabella of Aragon, Queen of France	28 May 1262	1262	Second cousins once removed	Alfonso II of Aragon
Philip III of Spain	Margaret of Austria, Queen of Spain	18 April 1599	1599	First cousins once removed	Ferdinand I, Holy Roman Emperor
Philip IV of Spain	Elisabeth of France (first wife)	25 November 1615	1615	Second cousins	Ferdinand I, Holy Roman Emperor
Philip IV of Spain	Mariana of Austria (second wife)	7 October 1649	1649	First cousins once removed^[70]	Charles II, Archduke of Austria
Philip V of Spain	Princess Maria Luisa of Savoy (first wife)	Barcelona, 2 November 1701	1701	Double second cousins	Victor Amadeus I, Duke of Savoy; Louis XIII of France
Philip V of Spain	Elisabeth Farnese (second wife)	Parma, 24 December 1714	1714	Third cousins	William V, Duke of Bavaria
Prince Philip of Bourbon-Two Sicilies	Princess Marie Louise of Orléans	12 January 1916	1916	Third cousins once removed	Ferdinand I of the Two Sicilies
Philip William, Elector Palatine	Anna Catherine Constance Vasa (first wife)	8 June 1642	1642	Second cousins	Albert V, Duke of Bavaria
Philip William, Elector Palatine	Landgravine Elisabeth Amalie of Hesse-Darmstadt (second wife)	3 September 1653	1653	Third cousins	Philip I, Landgrave of Hesse
Prince Philipp of Saxe-Coburg and Gotha	Princess Louise of Belgium	Brussels, 4 February 1875 (divorced Gotha, 15 January 1906)	1875	First cousins once removed (through Louis Philippe I of France); Second cousins (through Francis, Duke of Saxe-Coburg-Saalfeld)	Louis Philippe I of France; Francis, Duke of Saxe-Coburg-Saalfeld
Duke Philipp of Württemberg	Archduchess Maria Theresa of Austria	18 January 1865	1865	Third cousins	Francis I, Holy Roman Emperor and Maria Theresa of Austria
Duke Philipp of Württemberg (son of Carl, Duke of Württemberg)	Duchess Marie-Caroline in Bavaria (daughter of Prince Max, Duke in Bavaria)	27 July 1991	1991	Fifth cousins	Maximilian I Joseph of Bavaria
Philipp Albrecht, Duke of Württemberg	Archduchess Helena of Austria (first wife)	24 October 1923	1923	Second cousins	Ferdinand II of the Two Sicilies
Philipp Albrecht, Duke of Württemberg	Archduchess Rosa of Austria (second wife)	1 August 1928	1928	Second cousins	Ferdinand II of the Two Sicilies
Philipp Reinhard, Count of Hanau-Münzenberg	Countess Palatine Magdalena Claudia of Zweibrücken-Birkenfeld-Bischweiler	27 February 1689	1689	First cousins	Christian I, Count Palatine of Birkenfeld-Bischweiler
Philippe II, Duke of Orléans	Françoise Marie de Bourbon	18 February 1692	1692	First cousins	Louis XIII of France
Prince Philippe, Count of Paris	Princess Marie Isabelle of Orléans	30 May 1864	1864	First cousins	Louis Philippe I of France
Prince Philippe, Duke of Orléans	Archduchess Maria Dorothea of Austria	5 November 1896	1896	Second cousins	Louis Philippe I
Archduke Rainer Ferdinand of Austria	Archduchess Maria Karoline of Austria	21 February 1852	1852	First cousins	Leopold II, Holy Roman Emperor
Archduke Rainer Joseph of Austria	Princess Elisabeth of Savoy	28 May 1820	1820	Second cousins	Augustus III of Poland
Prince Ranieri, Duke of Castro	Maria Carolina Zamoyska	12 September 1923	1923	First cousins	Prince Francis, Count of Trapani
Ranuccio II Farnese, Duke of Parma	Princess Margaret Yolande of Savoy (first wife)	29 April 1660	1660	Second cousins (through Francesco I de' Medici, Grand Duke of Tuscany); Double third cousins	Francesco I de' Medici, Grand Duke of Tuscany; Cosimo I de' Medici, Grand Duke of Tuscany; Ferdinand I, Holy Roman Emperor
Ranuccio II Farnese, Duke of Parma	Isabella d'Este, Duchess of Parma (second wife)	18 February 1664	1664	First cousins	Ranuccio I Farnese, Duke of Parma
Ranuccio II Farnese, Duke of Parma	Maria d'Este (third wife)	1 October 1668	1668	First cousins	Ranuccio I Farnese, Duke of Parma
Prince Raphael Rainer of Thurn and Taxis	Princess Margarete of Thurn and Taxis	24 May 1932	1932	Second cousins	Maximilian Karl, 6th Prince of Thurn and Taxis
Prince Rasso of Bavaria	Archduchess Theresa of Austria	17 October 1955	1955	Third cousins	Leopold II, Grand Duke of Tuscany
Prince René of Bourbon-Parma	Princess Margaret of Denmark	9 June 1921	1921	Second cousins twice removed	John VI of Portugal
Richard, 1st Earl of Cornwall	Sanchia of Provence	November 23, 1243	1243	Fourth cousins	Humbert II, Count of Savoy
Richard of Conisburgh, 3rd Earl of Cambridge	Anne de Mortimer	May 1406	1406	First cousins twice removed	Edward III of England
Richard Plantagenet, 3rd Duke of York	Lady Cecily Neville	1429	1429	Second cousins	Edward III of England
Richard of Shrewsbury, Duke of York	Anne de Mowbray, 8th Countess of Norfolk	15 January 1478	1478	Second cousins once removed	Ralph de Neville, 1st Earl of Westmorland and Joan Beaufort
Richard, 6th Prince of Sayn-Wittgenstein-Berleburg	Princess Benedikte of Denmark	3 February 1968	1968	Fifth cousins once removed	Charles Frederick, Grand Duke of Baden
Richard I of England	Berengaria of Navarre	May 12, 1191	1191	Fourth cousins	Robert I, Duke of Burgundy
Richard II of England	Anne of Bohemia (first wife)	Westminster Abbey, 20 January 1382	1382	Fourth cousins	Henry III, Duke of Brabant
Richard II of England	Isabella of Valois (second wife)	31 October 1396	1396	Half-third cousins	Charles, Count of Valois
Richard III of England	Lady Anne Neville	Westminster Abbey, 12 July 1472	1472	First cousins once removed; second cousins once removed	Ralph de Neville, 1st Earl of Westmorland and Joan Beaufort; Edmund of Langley, 1st Duke of York
Robert the Bruce	Isabella of Mar (first wife)	1296	1296	Sixth cousins once removed	Duncan I of Scotland
Robert the Bruce	Elizabeth de Burgh (second wife)	1302	1302	Third cousins once removed	William Marshal, 1st Earl of Pembroke
Robert I, Duke of Parma	Princess Maria Pia of Bourbon-Two Sicilies (first wife)	Rome, 5 April 1869	1869	Half-first cousins once removed	Francis I of the Two Sicilies
Robert I, Duke of Parma	Infanta Maria Antonia of Portugal (second wife)	October 15, 1884 at Schloss Fischorn	1884	Second cousins once removed	Charles IV of Spain and Maria Luisa of Parma
Robert II of Scotland	Elizabeth Mure (first wife)	22 November 1347	1347	Fourth cousins once removed	William Comyn, Lord of Badenoch
Robert II of Scotland	Euphemia de Ross (second wife)	2 May 1355	1355	Third cousins once removed	William Comyn, Lord of Badenoch
Robert, King of Naples	Yolande of Aragon, Duchess of Calabria (first wife)	23 March 1297	1297	Second cousins once removed	Andrew II of Hungary
Robert, King of Naples	Sancia of Majorca (second wife)	17 June 1304	1304	Second cousins once removed	Andrew II of Hungary
Prince Robert, Duke of Chartres	Princess Françoise of Orléans	11 June 1863	1863	First cousins	Louis Philippe I
Robert, Archduke of Austria-Este	Princess Margherita of Savoy-Aosta	29 December 1953	1953	Fourth cousins once removed	Charles IV of Spain
Duke Robert of Württemberg	Archduchess Maria Immakulata of Austria	29 October 1900	1900	Double third cousins	Leopold II, Holy Roman Emperor; Ferdinand II of the Two Sicilies
Romanos III Argyros	Zoë Porphyrogenita	November 10, 1028	1028	Second cousin once removed	Romanos I Lekapenos
Rudolf, Crown Prince of Austria	Princess Stéphanie of Belgium	10 May 1881	1881	Second cousins once removed	Leopold II, Holy Roman Emperor
Rupprecht, Crown Prince of Bavaria	Duchess Marie Gabrielle in Bavaria (first wife)	10 July 1900	1900	Second cousins once removed	Maximilian I Joseph of Bavaria
Rupprecht, Crown Prince of Bavaria	Princess Antonia of Luxembourg (second wife)	7 April 1921	1921	Third cousins	Frederick, Duke of Saxe-Altenburg
Sancho II of Portugal	Mécia Lopes de Haro	1245	1245	Second cousins once removed	Afonso I of Portugal
Sancho Alfonso, 1st Count of Alburquerque	Beatrice, Countess of Alburquerque	1373	1373	Double second cousins	Sancho IV of Castile; Denis of Portugal
Infante Sebastian of Portugal and Spain	Princess Maria Amalia of Bourbon-Two Sicilies (first wife)	25 May 1832	1832	First cousins once removed	Charles IV of Spain
Infante Sebastian of Portugal and Spain	Infanta Maria Cristina of Spain (second wife)	19 November 1860	1860	First cousins once removed	Charles IV of Spain
Grand Duke Sergei Alexandrovich of Russia	Princess Elisabeth of Hesse and by Rhine	15 June 1884	1884	First cousins once removed	Louis II, Grand Duke of Hesse
Sigismund, Archduke of Austria	Catherine of Saxony, Archduchess of Austria	1484	1484	First cousins twice removed	Leopold III, Duke of Austria
Sigismund II Augustus	Elizabeth of Austria (first wife)	5 May 1543	1543	First cousins once removed	Casimir IV Jagiellon
Sigismund II Augustus	Catherine of Austria, Queen of Poland (third wife)	23 June 1553	1553	First cousins once removed	Casimir IV Jagiellon
Sigismund III Vasa	Anne of Austria, Queen of Poland (first wife)	31 May 1592	1592	Second cousins once removed	Casimir IV Jagiellon
Sigismund III Vasa	Constance of Austria (second wife)	December 11, 1605	1605	Second cousins once removed	Casimir IV Jagiellon
Prince Sigismund of Prussia	Princess Charlotte of Saxe-Altenburg	11 July 1919	1919	Double fourth cousins	Frederick William II of Prussia; Charles II, Grand Duke of Mecklenburg-Strelitz
Archduke Simeon of Austria	Princess María of Bourbon-Two Sicilies	13 July 1996	1996	Half-second cousins once removed	Robert I, Duke of Parma
Princess Sophie of Greece and Denmark	Prince Christoph of Hesse (first husband)	15 December 1930	1930	Second cousins once removed	Queen Victoria
Princess Sophie of Greece and Denmark	Prince George William of Hanover (second husband)	23 April 1946	1946	Second cousins (though Christian IX of Denmark); third cousins (through Queen Victoria)	Christian IX of Denmark; Queen Victoria
Stephen, King of England	Matilda of Boulogne	1125	1125	Fourth cousins once removed	Mathilde von Sachsen
Teodósio I, Duke of Braganza	Isabel de Lencastre (first wife)	1542	1542	First cousins	Fernando II, Duke of Braganza
Teodósio I, Duke of Braganza	Beatriz of Lencastre (second wife)	1559	1559	Third cousins once removed	Edward, King of Portugal
Prince Thomas, Duke of Genoa	Princess Isabella of Bavaria	21 May 1883	1883	Third cousins	Ferdinand I of the Two Sicilies
Thomas of Woodstock, 1st Duke of Gloucester	Eleanor de Bohun	1376	1376	Second cousins once removed	Edward I of England
Thomas of Lancaster, 1st Duke of Clarence	Margaret Holland, Duchess of Clarence	November 1411	1411	Second cousins once removed	Henry, 3rd Earl of Lancaster
Prince Tomislav of Yugoslavia	Princess Margarita of Baden	5 June 1957	1957	Third cousins once removed	Queen Victoria
Ulrich, Duke of Mecklenburg	Elizabeth of Denmark, Duchess of Mecklenburg	14 February 1556	1556	First cousins twice removed	Christian I of Denmark
Umberto I of Italy	Princess Margherita of Savoy	21 April 1868	1868	First cousins	Charles Albert of Sardinia
Umberto II of Italy	Marie José of Belgium	8 January 1930	1930	Third cousins once removed	Maximilian I Joseph of Bavaria
Prince Valdemar of Denmark	Princess Marie of Orléans	20 October 1885	1885	Third cousins once removed	Duke Louis of Mecklenburg-Schwerin
Valdemar II of Denmark	Dagmar of Bohemia	1205	1205	Third cousins	Vratislaus II of Bohemia
Victor, Prince Napoléon	Princess Clémentine of Belgium	14 November 1910	1910	Second cousins once removed	Leopold II, Holy Roman Emperor
Victor Amadeus I, Duke of Savoy	Christine of France	10 February 1619	1619	Third cousins	Philip I of Castile and Joanna of Castile
Victor Amadeus I, Prince of Carignano	Maria Vittoria of Savoy	7 November 1714	1714	Second cousins once removed	Charles Emmanuel I, Duke of Savoy
Victor Amadeus II of Sardinia	Anne Marie d'Orléans	10 April 1684	1684	Second cousins	Henry IV of France
Victor Amadeus III of Sardinia	Maria Antonia Ferdinanda of Spain	12 April 1750	1750	Double third cousins	Victor Amadeus I, Duke of Savoy; Louis XIII of France
Victor Emmanuel I of Sardinia	Maria Theresa of Austria-Este, Queen of Sardinia	25 April 1789	1789	Half-third cousins	Philippe I, Duke of Orléans
Victor Emmanuel II of Italy	Archduchess Adelaide of Austria	Palazzina di caccia of Stupinigi, 12 April 1842	1842	First cousins	Charles Emmanuel, Prince of Carignano
Princess Victoria Melita of Saxe-Coburg and Gotha	Ernest Louis, Grand Duke of Hesse and by Rhine (first husband)	Schloss Ehrenburg, Coburg, 9 April 1894	1894	First cousins	Queen Victoria
Princess Victoria Melita of Saxe-Coburg and Gotha	Grand Duke Cyril Vladimirovich of Russia (second husband)	Tegernsee, 8 October 1905	1905	First cousins	Alexander II of Russia
Princess Victoria of Hesse and by Rhine	Prince Louis of Battenberg	Darmstadt, 30 April 1884	1884	First cousins once removed	Louis II, Grand Duke of Hesse and by Rhine
Queen Victoria of the United Kingdom	Prince Albert of Saxe-Coburg and Gotha	Chapel Royal, St. James's Palace, 10 February 1840	1840	First cousins	Francis, Duke of Saxe-Coburg-Saalfeld
Vincenzo Gonzaga, Duke of Mantua	Margherita Farnese (first wife)	2 March 1581	1581	Second cousins once removed	Philip I of Castile and Joanna of Castile
Vincenzo Gonzaga, Duke of Mantua	Eleanor de' Medici (second wife)	29 April 1584	1584	First cousins	Ferdinand I, Holy Roman Emperor
Grand Duke Vladimir Alexandrovich of Russia	Duchess Marie of Mecklenburg-Schwerin	28 August 1874	1874	Second cousins	Frederick William III of Prussia
Walter Stewart, 6th High Steward of Scotland	Marjorie Bruce	1315	1315	Fourth cousins once removed	Walter Stewart, 3rd High Steward of Scotland
Prince Welf Henry of Hanover	Princess Alexandra of Ysenburg and Büdingen	20 September 1960	1960	Fourth cousins	Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach
Wilhelm II, German Emperor	Princess Augusta Victoria of Schleswig-Holstein-Sonderburg-Augustenburg (first wife)	27 February 1881	1881	Half-second cousins	Princess Victoria of Saxe-Coburg-Saalfeld
Wilhelm II, German Emperor	Hermine Reuss of Greiz (second wife)	5 November 1922	1922	Fifth cousins	George II of Great Britain
Wilhelm, German Crown Prince	Duchess Cecilie of Mecklenburg-Schwerin	6 June 1905	1905	Third cousins	Frederick William III of Prussia
Prince Wilhelm of Prussia	Princess Maria Anna of Hesse-Homburg	1804	1804	First cousins	Louis IX, Landgrave of Hesse-Darmstadt
Prince Wilhelm, Duke of Södermanland	Grand Duchess Maria Pavlovna of Russia	3 May 1908	1908	Third cousins	Frederick William III of Prussia
Duke Wilhelm in Bavaria	Countess Palatine Maria Anna of Zweibrücken-Birkenfeld	30 January 1780	1780	Second cousins once removed	Christian I, Count Palatine of Birkenfeld-Bischweiler
Wilhelm Friedrich, Duke of Schleswig-Holstein	Princess Marie Melita of Hohenlohe-Langenburg	5 February 1916	1916	Second cousins	Ernst I, Prince of Hohenlohe-Langenburg
Wilhelmina of the Netherlands	Prince Henry, Duke of Mecklenburg-Schwerin	7 February 1901	1901	Third cousins	Frederick William II of Prussia
William the Conqueror	Matilda of Flanders	1051	1051	Third cousins once removed	Fulk II, Count of Anjou
William the Lion	Ermengarde de Beaumont	5 September 1186	1186	Fourth cousins	Robert I, Duke of Normandy
William the Silent	Anna of Saxony	24 August 1561	1561	Third cousins once removed	Louis I, Landgrave of Hesse
William I, Count of Boulogne	Isabel de Warenne, Countess of Surrey	1148	1148	Fourth cousins	Robert II of France
William I, German Emperor	Augusta of Saxe-Weimar-Eisenach	11 June 1829	1829	Second cousins	Louis IX, Landgrave of Hesse-Darmstadt
William I of the Netherlands	Princess Wilhelmine of Prussia	Berlin, 1 October 1791	1791	First cousin	Prince Augustus William of Prussia
William I of Württemberg	Pauline Therese of Württemberg (third wife)	5 April 1820	1820	First cousins	Frederick II Eugene, Duke of Württemberg
William I, Elector of Hesse	Princess Wilhelmina Caroline of Denmark	1 September 1764	1764	First cousins	George II of Great Britain
William II of Württemberg	Princess Marie of Waldeck and Pyrmont (first wife)	15 February 1877	1877	Second cousins once removed	Frederick I of Württemberg
William II of Württemberg	Charlotte of Schaumburg-Lippe (second wife)	8 April 1886	1886	Fifth cousins	Louis VIII, Landgrave of Hesse-Darmstadt
William II of the Netherlands	Anna Pavlovna of Russia	21 February 1816	1816	Third cousins	Frederick William I of Prussia
William III of the Netherlands	Princess Sophie of Württemberg (first wife)	Stuttgart, 18 June 1839	1839	First cousins	Paul I of Russia
William III of the Netherlands	Emma of Waldeck and Pyrmont (second wife)	7 January 1879	1879	Second cousins twice removed	Frederick II Eugene, Duke of Württemberg
William III of England	Mary II of England	4 November 1677	1677	First cousins	Charles I of England
William III, Landgrave of Thuringia	Anne of Austria, Landgravine of Thuringia	2 June 1446	1446	Double fourth cousins	Albert I of Germany; Wartislaw IV, Duke of Pomerania
William IV of the United Kingdom	Adelaide of Saxe-Meiningen	11 July 1818	1818	Third cousins once removed	Ernest I, Duke of Saxe-Gotha
William IV, Prince of Orange	Anne, Princess Royal and Princess of Orange	25 March 1734	1734	Fourth cousins once removed	William the Silent
William V, Prince of Orange	Wilhelmina of Prussia, Princess of Orange	4 October 1767	1767	Second cousins	George I of Great Britain
William V, Duke of Bavaria	Renata of Lorraine	22 February 1568	1568	Second cousins	Philip I of Castile and Joanna of Castile
William VIII, Landgrave of Hesse-Kassel	Dorothea Wilhelmine of Saxe-Zeitz	27 September 1717	1717	Second cousins	George William, Elector of Brandenburg
William, Duke of Nassau	Princess Pauline of Württemberg	23 April 1829	1829	Third cousins once removed	George II of Great Britain
William, Prince of Hohenzollern	Princess Maria Teresa of Bourbon-Two Sicilies (first wife)	27 June 1889	1889	Third cousins once removed	Charles IV of Spain
William, Prince of Hohenzollern	Princess Adelgunde of Bavaria (second wife)	20 January 1915	1915	Third cousins once removed	Leopold II, Holy Roman Emperor
William, Prince of Wied	Princess Marie of the Netherlands	18 July 1871	1871	Second cousins once removed	Charles II, Grand Duke of Mecklenburg-Strelitz
Prince William, Duke of Cambridge	Catherine, Duchess of Cambridge	29 April 2011	2011	11th cousins once removed (through Sir William Blakiston and Jane Lambton); Fourteenth cousins once removed (through Sir Thomas Fairfax and wife Anne Gascoigne)	Sir William Blakiston and Jane Lambton; Sir Thomas Fairfax and Anne Gascoigne
Prince William of Baden	Duchess Elisabeth Alexandrine of Württemberg	16 October 1830	1830	Second cousins once removed	John William Friso, Prince of Orange
Prince William of Baden	Princess Maria Maximilianovna of Leuchtenberg	11 February 1863	1863	Fourth cousins once removed	Frederick William I of Prussia
Prince William of Schaumburg-Lippe	Princess Bathildis of Anhalt-Dessau	30 May 1862	1862	Third cousins once removed	Christian III, Count Palatine of Zweibrücken
William, Duke of Jülich-Cleves-Berg	Maria of Austria, Duchess of Jülich-Cleves-Berg	18 July 1546	1546	Fourth cousins	Ernest, Duke of Austria
Duke William of Mecklenburg-Schwerin	Princess Alexandrine of Prussia	9 December 1865	1865	First cousins	Frederick William III of Prussia
William the Younger, Duke of Brunswick-Lüneburg	Dorothea of Denmark, Duchess of Brunswick-Lüneburg	12 October 1561	1561	Second cousins	John Cicero, Elector of Brandenburg
William Ernest, Grand Duke of Saxe-Weimar-Eisenach	Princess Caroline Reuss of Greiz (first wife)	30 April 1903	1903	Third cousins once removed	Charles Christian, Prince of Nassau-Weilburg
William Ernest, Grand Duke of Saxe-Weimar-Eisenach	Princess Feodora of Saxe-Meiningen (second wife)	14 January 1910	1910	Third cousins	Georg I, Duke of Saxe-Meiningen
Prince William Frederick, Duke of Gloucester and Edinburgh	Princess Mary of Great Britain	22 July 1816	1816	First cousins	Frederick, Prince of Wales
William Frederick, Prince of Wied	Princess Pauline of Württemberg	29 October 1898	1898	Half-second cousins	William, Duke of Nassau
Władysław IV, king of Poland	Cecilia Renata of Austria (first wife)	Vienna, 9 August 1637	1637	First cousins	Charles II, Archduke of Austria and Maria Anna of Bavaria
Prince Wolfgang of Hesse	Princess Marie Alexandra of Baden	17 September 1924	1924	Second cousins once removed	Prince William of Hesse-Kassel
Wolfgang Wilhelm, Count Palatine of Neuburg	Magdalene of Bavaria	11 November 1613	1613	Second cousins	Ferdinand I, Holy Roman Emperor
Wolrad, Prince of Schaumburg-Lippe	Princess Bathildis of Schaumburg-Lippe	April 1925	1925	Second cousins	George William, Prince of Schaumburg-Lippe

Outside Europe

Airlangga, regional king of Bali, Indonesia and his first cousin
Akhenaten and his sister^[75]
King Bhumibol Adulyadej of Thailand and his first cousin once removed Mom Rajawongse Sirikit Kitiyakara
Prithviraj Chauhan of India and his first cousin once removed Sanyogita.
King Darius I of Persia and his third cousin, Atossa
Emperor Ichijō of Japan and his wife Fujiwara no Akiko
Emperor Kōbun of Japan and Empress Tōchi
King Kamehameha the Great of Hawaiʻi and his second cousins: Queen Kaahumanu, Queen Kaheiheimālie and Queen Namahana Piʻia
Alexander Liholiho King Kamehameha IV of Hawaiʻi and his second cousin, Queen Emma Kaleleonalani Naʻea
Abdullah I of Jordan and his first cousin, Musbah bint Nasser
Talal of Jordan and his first cousins, Zein al-Sharaf Talal
Hussein of Jordan and his first cousin once removed Sharifa Dina bint 'Abdu'l-Hamid
Prince Hamzah bin Al Hussein and his second cousin Princess Noor Hamzah
Prince Nagaya of Japan and his wife Princess Kibi
Prince Shōtoku of Japan and his wife Princess Uji no Kaitako
Zaitian, the Guangxu Emperor and his first cousin, Yehenara Jingfen
Emperor Kōkaku and his second cousin once removed, Princess Yoshiko (Kōkaku)
Emperor Meiji and his distant cousin, Empress Shōken
Emperor Taishō and his distant cousin, Empress Teimei
Emperor Hirohito of Japan and his distant cousin Princess Nagako of Kuni
Shigeko, Princess Teru and her double first cousin once removed, Prince Morihiro Higashikuni
Princess Masako Takeda and her distant cousin, Prince Tsunehisa Takeda
Fusako, Princess Kane and her distant cousin, Prince Naruhisa Kitashirakawa
Princess Nobuko Asaka and her distant cousin, Prince Yasuhiko Asaka
Toshiko, Princess Yasu and her distant cousin, Prince Naruhiko Higashikuni
Princess Sumiko and her distant cousin, Prince Yamashina Akira
Princess Yasuko of Mikasa and her distant cousin, Tadateru Konoe
Prince Yamashina Takehiko and his second cousin, Princess Sakiko
Prince Kuni Asaakira and his cousin, Princess Tomoko
Prince Fushimi Sadanaru and his distant cousin, Princess Arisugawa Toshiko
Crown Prince Sado of Joseon and his fourth cousin twice removed Lady Hong Hyegyeong
Buddha Loetla Nabhalai and his first cousin, Sri Suriyendra
Chulalongkorn and his first cousin once removed, Ubolratana Narinaka. He also married his half-sisters Sunandha Kumariratana, Savang Vadhana, Saovabha Phongsri, Sukhumala Marasri, and Thaksincha
Chulalongkorn and his first cousin once removed, Saovabhak Nariratana
Chulalongkorn and his first cousin once removed, Saisavali Bhiromya
Vajiravudh and his first cousin, Lakshamilavan
Prajadhipok and his first cousin, Rambai Barni
Vajiralongkorn, Crown Prince of Thailand and his first cousin Mom Luang Soamsavali Kitiyakara
Adulakit Kitiyakara and his second cousin, Bandhusawali Yugala
Kitiyakara Voralaksana and his first cousin, Mom Chao Absornsamarn Dhevakul
Nakkhatra Mangala and his second cousin, Bua Sanidvongs
Varananda Dhavaj and his first cousin, Galyani Vadhana
Yugala Dighambara and his first cousin, Chalermkhetra Mangala
Vibhavadi Rangsit and her first cousin once removed, Piyarangsit Rangsit
Wan Waithayakon and his first cousin once removed, Bibulaya Benching Kitiyakara
Vimolchatra and her first cousin, Udaya Chalermlabh Vudhijaya
Zaichun, the Tongzhi Emperor and his second cousin Lady Alute^[76]
Emperor Taizong of Tang and his second cousin Consort Yang^[77]
Emperor Zhongzong of Tang and his first cousin Lady Zhao^[78]
Emperor Xianzong of Tang and his first cousin once removed Lady Guo
Emperor Wen of Western Wei and his first cousin Lady Yifu
Takako, Princess Suga of Japan and her distant cousin Hisanaga Shimazu
Emperor Wu of Han and his first cousin Chen Jiao
Hayam Wuruk, last king of Majapahit, and half sister Padukasori, daughter of Dyah Wiyat, they have 1 father, different mothers
Emperor Guangwu of Han and his fifth cousin once removed Guo Shengtong
Puyi, Xuantong Emperor and his fourth cousin thrice-removed Gobulo Wan Rong
Princess Wen Ying (younger sister of Puyi) and her fourth cousin thrice-removed Gobulo Runliang (full older brother of Wan Rong)
Princess Wen Wing (younger sister of Puyi) and her fourth cousin thrice-removed Gobulo Runqi (younger half-brother of Wan Rong)
Princess Baling of Tang (daughter of Emperor Taizong of Tang) and her first cousin Chai Lingwu, Duke of Xiangyang^[79]
Emperor Ruizong of Tang and his second cousin Consort Dou
Princess Taiping of Tang (daughter of Emperor Gaozong of Tang) and her first husband and first cousin Xue Shao,^[80] as well as her second husband and second cousin Wu Youji, Prince Zhongdian of Ding
Li Xianhui, Lady Yongtai (daughter of Emperor Zhongzong of Tang) and her first cousin Wu Yanji, Prince of Wei^[81]^[82]
Li Guo'er, Princess Anle and her first husband and second cousin Wu Chongxun, Prince of Gaoyang,^[83] as well as her second husband and first cousin Wu Yanxiu, Prince of Huaiyang^[81]^[84]
King Muyeol of Silla and his first cousin once removed Kim Mun-hui (posthumously known as Queen Munmyeong)
Princess Cheonmyeong of Silla (daughter of King Jinpyeong of Silla) and her first cousin once removed Kim Yongsu
State Princess Wenxian (daughter of the Kangxi Emperor) and her second cousin Tunggiya Shun’anyan
King Xerxes I of Persia and his first cousin Amestris
King Antiochus III the Great of the Seleucid Empire and his first cousin Princess Laodice of Pontus
King Mithridates III of Commagene and his first cousin Princess Isias Philostorgos of Cappadocia
King Antiochus VIII Grypus of the Seleucid Empire and his first cousin Princess Tryphaena of Egypt
Gaius Julius Archelaus Antiochus Epiphanes and his fourth cousin or third cousin once removed Claudia Capitolina
Ibn Saud and his second cousin, Al Jawhara bint Musaed Al Jiluwi
Ibn Saud and his first cousin once removed, Hussa bint Ahmed Al Sudairi
Faisal of Saudi Arabia and his second cousin, Sultana bint Ahmed Al Sudairi.
Salman bin Abdulaziz Al Saud and his first cousin, Sultana bint Turki Al Sudairi
Nasser bin Abdulaziz Al Saud and his second cousin, Muhdi bint Ahmed bin Mohammed Al Sudairi
Al Bandari bint Abdulaziz Al Saud and her first cousin, Bandar bin Muhammad bin Abdul Rahman Al Saud
Luluwah bint Abdulaziz Al Saud and her second cousin once removed, Faisal bin Turki bin Abdullah bin Saud Al Saud
Nayef bin Abdul-Aziz Al Saud and his cousin Maha al-Sudairi
Al Jawhara bint Abdulaziz Al Saud and her first cousin, Khalid ibn Abdullah
Seeta bint Abdulaziz Al Saud and her distant cousin, Abdullah bin Mohammed bin Saud Al Kabir Al Saud
Badr bin Abdulaziz Al Saud and his first cousin, Hessa bint Abdullah Al Sudairi
Haya bint Abdulaziz Al Saud and her first cousin, Muhammad bin Saud bin Abdul Rahman Al Saud
Khalid bin Faisal Al Saud and his first cousin once removed, Al Anoud bint Abdullah bin Mohammad bin Abdul Rahman Al Saud
Muhammad bin Saad and his first cousin, Seeta bint Saud bin Abdulaziz Al Saud
Saud bin Abdul Muhsin Al Saud and his first cousin, Lolowah bint Faisal Al Saud
Turki bin Nasser and his first cousin, Noura bint Sultan bin Abdulaziz Al Saud
Khalid bin Sultan and his first cousin, Lulua bint Fahd
Khalid bin Sultan and his first cousin, Abeer bint Turki bin Abdulaziz
Bandar bin Sultan and his first cousin, Haifa bint Faisal
Muhammad bin Fahd and his first cousin, Jawahir bint Nayef bin Abdulaziz Al Saud
Khalid bin Abdullah bin Abdulaziz Al Saud and his first cousin, Noura bint Abdullah bin Muhammad bin Abdullah
Saud bin Fahd Al Saud and his first cousin, Mudhawi bint Musaid bin Abdulaziz Al Saud
Mohammed bin Nawwaf bin Abdulaziz and his first cousin once removed, Fadwa bint Khaled bin Abdallah Al Saud
Al-Waleed bin Talal and his first cousin, Dalal int Saud
Saud bin Faisal bin Abdulaziz Al Saud and his first cousin once removed, Jawhara bint Abdullah bin Abdul-Rahman
Sultan bin Salman Al Saud and his first cousin once removed, Haifa bint Saud
Abdulaziz bin Majid and his first cousin once removed, Nuha bint Saud
Muhammad bin Nayef and his first cousin Reema bint Sultan
Abdulaziz bin Salman and his first cousin once removed, Sara bint Khalid bin Musa'ad bin Abdulaziz
Khaled bin Talal bin Abdul Aziz Al Saud and his first cousin once removed, Jazzi bint Saud bin Abdul Aziz Al Saud
Sultan bin Turki II bin Abdulaziz Al Saud and his first cousin, Nora bint Abdullah
Turki bin Abdullah Al Saud and his first cousin once removed, Hala int Khalid
Abdul Aziz bin Fahd and his first cousin once removed, Al Anoud bint Faisal Al Saud
Salman bin Sultan and his first cousin, Falwa bint Ahmed bin Abdulaziz Al Saud
Prince Abdulaziz bin Talal bin Abdulaziz Al Saud and his first cousin once removed, Sora Saud
Mishaal bin Saud and his first cousin once removed, Sara bint Faisal bin Turki I bin Abdulaziz Al Saud
Faisal bin Turki I bin Abdulaziz Al Saud and his first cousin, Hassa bint Saud bin Abdulaziz Al Saud
Fahad bin Saud bin Abdulaziz Al Saud and his first cousin, Al Anoud bint Faisal Al Saud
Muhammed bin Saud Al Saud and his first cousin, Sara bint Faisal Al Saud
Faisal bin Fahd and his first cousin, Munira bint Sultan bin Abdulaziz Al Saud
Fahd bin Salman bin Abdulaziz Al Saud and his first cousin, Nuf bint Khalid bin Abdallah Al Abdul Rahman
Ahmed bin Salman bin Abdulaziz Al Saud and his first cousin once removed, Lamia bint Mishaal bin Saud bin Abdulaziz Al Saud
Noura bint Abdul Rahman Al Saud and her first cousin once removed, Saud ibn Abd al-Aziz ibn Saud
Mutaib bin Abdullah and his first cousin once removed, Jawahir bint Abdallah bin Abdul Rahman Al Saud
Fahd bin Abdullah bin Mohammed Al Saud and his first cousin, Fahda bint Bandar bin Mohammed bin Abdul Rahman Al Saud
Faisal bin Fahd bin Abdullah Al Saud and his second cousin once removed, Nouf bint Mutaib bin Abdullah bin Abdulaziz Al Saud
Faisal bin Abdullah bin Mohammed Al Saud and his first cousin, Adila bint Abdulla Al Saud
Moudi bint Khalid Al Saud and her first cousin, Abdul Rahman bin Faisal bin Abdulaziz Al Saud
Reema bint Bandar Al Saud and her first cousin, Faisal bin Turki bin Nasser
Mohammed bin Rashid Al Maktoum, Prime Minister of the United Arab Emirates, and his first cousin, Hind bint Maktoum bin Juma Al Maktoum
Hamad bin Isa Al Khalifa and his first cousin, Sabika bint Ibrahim Al Khalifa
Khalifa bin Salman Al Khalifa and his first cousin, Hessa bint Ali Al Khalifa
Rashid bin Khalifa Al Khalifa and his second cousin, Lulwa bint Khalifa Al Khalifa
Hamad bin Khalifa Al Thani and his first cousin, Sheikha Mariam bint Muhammad Al-Thani
Hamad bin Khalifa Al Thani and his first cousin, Sheikha Noora bint Khalid Al-Thani
Tamim bin Hamad Al Thani and his first cousin, Sheikha Jawahir bint Hamad Al Thani
Al-Mayassa bint Hamad bin Khalifa Al-Thani and her second cousin, Sheikh Jassim bin Abdul Aziz Al-Thani
Abdullah bin Khalifa Al Thani and his first cousin, Lolwa bint Jassim bin Hamad
Hamad bin Suhaim Al Thani and his first cousin, Aisha bint Khalifa bin Hamad Al Thani
Saud bin Abdelaziz bin Hamad Al Thani and his first cousin, Roda bint Jassim bin Hamad bin Abdullah Al Thani
Saud bin Abdelaziz bin Hamad Al Thani and his first cousin, Lolwa bint Mohammed bin Hamad bin Abdullah Al Thani
Sabah Al-Ahmad Al-Jaber Al-Sabah and his first cousin once removed, Sheikha Fatuwah bint Salman Al-Sabah
Jaber II Al-Sabah and his first cousin, Shekha bint Abdullah II Al-Sabah
Tupou VI and his second cousin, Nanasipauʻu Tukuʻaho
Tupoutoʻa ʻUlukalala and his double second cousin, Sinaitakala Fakafanua
ʻElisiva Fusipala Taukiʻonetuku and her first cousin, Siaʻosi Fatafehi Toutaitokotaha
Mohammed V of Morocco and his first cousin, Lalla Abla bint Tahar
Moulay Ali Alaoui and his first cousin, Lalla Fatima Zohra
Tewfik Pasha and his first cousin once removed, Emina Ilhamy
Muhammad Abdel Moneim and his third cousin, Fatma Neslişah
Rukiye Sabiha Sultan and her second cousin, Ömer Faruk Efendi
Qaboos bin Said al Said and his first cousin, Sayyida Nawwal bint Tariq Al Said
Taimur bin Feisal and his first cousin once removed, Fatima bint Ali Al Said
Faisal bin Turki and his first cousin, Aliya bint Thuwaini Al Said
Moshoeshoe II of Lesotho and his second cousin once removed, Queen Mamohato of Lesotho
Hassanal Bolkiah and his first cousin, Queen Saleha of Brunei
Omar Ali Saifuddien III and his first cousin once removed, Pengiran Anak Damit
Norodom Suramarit and his first cousin once removed, Sisowath Kossamak
Sisowath Monivong and his first cousin once removed, Norodom Kanviman Norleak Tevi
Ghazi of Iraq and his first cousin, Aliya bint Ali

Aristocracy

Person	Spouse	Married	Relationship	Common ancestor(s)
Lady Frances Brandon	Henry Grey, 1st Duke of Suffolk (first husband)	Southwark, London, 1533	Half-second cousins	Elizabeth Woodville
Robert Dudley, 1st Earl of Leicester	Amy Robsart (first wife)	4 June 1550	Sixth cousins once removed	Thomas de Beauchamp, 11th Earl of Warwick
Robert Dudley, 1st Earl of Leicester	Lettice Knollys (second wife)	Wanstead Park, Essex, 21 September 1578	Sixth cousins	Thomas de Beauchamp, 11th Earl of Warwick
Jessica Mitford	Esmond Romilly	18 May 1937	second cousin
Pedro Sánchez de Tagle, 2nd Marquis of Altamira	Luisa Sánchez de Tagle (daughter of Luis Sánchez de Tagle, 1st Marquis of Altamira)		First cousins	Don Anselmo Sánchez de Tagle
María de la Paz Rodríguez Albuerne y Girón (daughter of Manuel Rodriguez de Albuerne y Pérez de Tagle, 5th Marquis of Altamira)	José María Trespalacios Rodríguez de Albuerne		First cousins	Don Juan Rodríguez de Albuerne and Luisa Pérez de Tagle, 4th Marquesa of Altamira
Humphrey Stafford, 1st Duke of Buckingham	Lady Anne Neville	Raby Castle, County Durham, before 18 October 1424	Second cousins	Edward III of England
Humphrey Stafford, Earl of Stafford	Lady Margaret Beaufort		Third cousins	Edward III of England
Roger Mortimer, 4th Earl of March	Lady Alianore Holland	7 October 1388	Third cousins once removed	Edward I of England
Thomas Holland, 2nd Earl of Kent	Lady Alice FitzAlan	10 April 1364	Third cousins	Henry III of England
Lady Eleanor Neville	Richard le Despenser, 4th Baron Burghersh (first husband)		Second cousins	Edward III of England
Lady Eleanor Neville	Henry Percy, 2nd Earl of Northumberland (second husband)		Second cousins	Ralph Neville, 2nd Baron Neville de Raby
John Beaufort, 1st Earl of Somerset	Lady Margaret Holland	27 September 1397	Third cousins	Edward I of England
Lady Elizabeth Percy	Ralph Neville, 2nd Earl of Westmorland (second husband)	1426	Second cousins once removed	Ralph Neville, 2nd Baron Neville de Raby
Henry Bourchier, 1st Earl of Essex	Isabel of Cambridge		Second cousins	Edward III of England
Edmund Mortimer, 5th Earl of March	Lady Anne Stafford		Second cousins	Edward III of England
John de Mowbray, 3rd Duke of Norfolk	Eleanor Bourchier		Second cousins once removed	Edward III of England
Lady Katherine Neville	John de Mowbray, 2nd Duke of Norfolk (first husband)	12 January 1411	Fourth cousins	Edward I of England
Henry Fitzalan-Howard, 15th Duke of Norfolk	Gwendolen Constable-Maxwell, 12th Lady Herries of Terregles	5 February 1904	First cousins once removed	Henry Howard, 13th Duke of Norfolk
Giovanni dalle Bande Nere	Maria Salviati	15 November 1516	Third cousins once removed	Giovanni di Bicci de' Medici
Laudomia de' Medici	Piero Strozzi	1539	Fourth cousins once removed	Giovanni di Bicci de' Medici
Laudomia de' Medici	Alamanno Salviati		Fourth cousins	Giovanni di Bicci de' Medici
Maddalena de' Medici	Roberto Strozzi		Fourth cousins once removed	Giovanni di Bicci de' Medici
Lady Catherine Grey	Edward Seymour, 1st Earl of Hertford (second husband)	Hertford House, Canon Row, London, c. 27 November 1560	Sixth cousins once removed	Philippa, 5th Countess of Ulster
Lady Jane Grey	Lord Guildford Dudley	Durham House, London, 21 May 1553	Third cousins once removed	Elizabeth Ferrers, 6th Baroness Ferrers of Groby
Lord Edward Cavendish	Emma Lascelles	3 August 1865	First cousins	George Howard, 6th Earl of Carlisle
William Cavendish, 7th Duke of Devonshire	Lady Blanche Georgiana Howard	6 August 1829	Second cousins	William Cavendish, 4th Duke of Devonshire and Charlotte Boyle, 6th Baroness Clifford
Isabella Appiani, Princess of Piombino	Paolo Giordano II Orsini, Duke of Bracciano (second husband)	Rome, 1622	Third cousins	Jacopo Salviati
Henry Sturt, 1st Baron Alington	Lady Augusta Bingham (first wife)	10 September 1853	First cousins	Robert Brudenell, 6th Earl of Cardigan
William Donn de Burgh, 3rd Earl of Ulster	Maud of Lancaster	before 16 November 1327	Third cousins once removed	Henry III of England
George Spencer-Churchill, 6th Duke of Marlborough	Lady Jane Stewart (first wife)	St George's, Hanover Square, London, 13 January 1819	First cousins	John Stewart, 7th Earl of Galloway
George Spencer-Churchill, 6th Duke of Marlborough	Jane Stewart (third wife)	18 October 1851	First cousins	John Stewart, 7th Earl of Galloway
Lady Louisa Spencer-Churchill (daughter of George Spencer-Churchill, 6th Duke of Marlborough)	The Hon. Robert Spencer (son of Francis Spencer, 1st Baron Churchill)	4 July 1845	First cousins once removed	George Spencer, 4th Duke of Marlborough
William Kerr, 1st Earl of Lothian	Anne Kerr, 3rd Countess of Lothian	1630	Fifth cousins once removed	Andrew Kerr of Altonburn and Cessford
William FitzRoy (son of Charles FitzRoy, 1st Baron Southampton)	Lady Elizabeth FitzRoy (daughter of Augustus FitzRoy, 3rd Duke of Grafton)	4 July 1811	First cousins	Lord Augustus FitzRoy
George Waldegrave, 4th Earl Waldegrave	Elizabeth Waldegrave, Countess Waldegrave	5 May 1782	First cousins	James Waldegrave, 1st Earl Waldegrave
Robert Grosvenor, 5th Duke of Westminster	Hon. Viola Lyttelton	3 December 1946	Second cousins	William Cavendish, 2nd Baron Chesham
William FitzClarence, 2nd Earl of Munster	Wilhelmina Kennedy-Erskine	17 April 1855	First cousins	William IV of the United Kingdom
Nathan Rothschild, 1st Baron Rothschild	Emma Louise von Rothschild	16 April 1867	Second cousins	Mayer Amschel Rothschild
George Mountbatten, 2nd Marquess of Milford Haven	Countess Nadejda Mikhailovna de Torby	15 November 1916	Double third cousins once removed	Charles Frederick, Grand Duke of Baden; Charles Louis, Hereditary Prince of Baden
Jaime Álvares Pereira de Melo, 3rd Duke of Cadaval	Luísa, Duchess of Cadaval		Fourth cousins	Jaime, Duke of Braganza
Philippe II de Croÿ	Anne de Croÿ		Third cousins	Jean II de Croÿ

References

Notes

↑ This Day in History in 1828, www.history.com. Retrieved 3-13-2008.
↑ Instituto Dominicano de Genealogía, Inc
↑ HOASM: Johann Sebastian Bach, Here of a Sunday Morning. Retrieved 3-13-2008.
↑ Cápsulas Genealógicas
↑ Goodrich, Charles A. (1829). Lives of the Signers to the Declaration of Independence, pp. 131–38. New York: William Reed & Co.
↑ "Christine Boutin poursuivra en justice ceux qui l'attaquent sur son mari (et cousin germain)", ozap.com, 5-29-2013.
↑ Bob Ward. Dr. Space: The Life of Wernher von Braun. p. 72.
↑ Charles Bulfinch biography, nndb. Retrieved 3-13-2008.
↑ Floride Bonneau Colhoun Calhoun (Mrs. John C. Calhoun), Clemson University. Retrieved 3-13-2008.
↑ Jeanne Calment, World's Elder, Dies at 122, The New York Times. Retrieved 3-13-2008.
↑ THREE GENERATIONS OF CARROLLS, Charles Carroll House. Retrieved 3-13-2008.
↑ Intimate Disclosures in Darwin Letters, The New York Times, 8-29-1915. Retrieved 3-13-2008.
↑ Peter Raven & George Johnson (1995). Understanding Biology 3rd Edition. Wm. C. Brown Communications. p. 287. ISBN 0-697-22213-6.
↑ "Alfred I. duPont Papers" (PDF). Archived from the original (PDF) on February 21, 2007. Retrieved 2008-05-19.
↑ Albert Einstein – Great Minds, Great Thinkers, edInformatics. Retrieved 3-13-2008.
↑ Notable Kin: NEW HAMPSHIRE, RHODE ISLAND, AND CONSTITUTION SIGNERS, New England Historic Genealogical Society. Retrieved 3-13-2008. Archived November 25, 2005, at the Wayback Machine.
↑ Notable Kin: Boston Cousins of Queen Victoria and Yankee Ancestors of Mrs. Thomas Philip, New England Historic Genealogical Society. Retrieved 3-13-2008.
↑ Cápsulas genealógicas: Santiago, la cuna de los Espaillat
↑ Beau Riffenburgh. Encyclopedia of the Antarctic – Volume 1. Taylor & Francis. p. 424.
↑ FABIO FIALLO Popular poeta romántico y opositor resuelto a la intervención militar del 16
↑ Goodwin, Doris Kearns (2001). The Fitzgeralds and the Kennedys: An American Saga. Simon and Schuster. pp. 88–89.
↑ Carlo Gambino, His Rise As New York's Mafia King, John J. Flood and Jim McGough. Retrieved 3-13-2008.
↑ Jocelyn Van Tuyl (2012). Andre Gide and the Second World War: A Novelist's Occupation. SUNY Press. p. 5.
↑ Biographies – Charlotte Perkins Gilman, Gale Group. Retrieved 3-13-2008. Archived April 18, 2008, at the Wayback Machine.
↑ Jeffrey Ian Ross. Encyclopedia of Street Crime in America. SAGE. p. 177.
↑ Spalding, Frances. Duncan Grant: A Biography. Random House. ISBN 0-7126-6640-0.
↑ Edward and Nina Grieg, Peter Hughes. Retrieved 3-13-2008. Archived March 14, 2008, at the Wayback Machine.
↑ The Bloodlines of Statesment and Noblemen, Pat Roberts. Retrieved 3-13-2008.
↑ Alan O. Ebenstein (2001). Friedrich Hayek: A Biography. Basingstoke: Palgrave Macmillan Trade. p. 169. ISBN 978-0312233440.
↑ Monica Partridge. Alexander Herzen: 1812–1870. p. 21.
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↑ Zee James – Wife of Jesse James, Kathy Weiser. Retrieved 3-13-2008.
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↑ In My Life: Arthur Henry King
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↑ Howard Maxford. David Lean. p. 14.
↑ Myra Lewis-Williams Interview
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↑ , Delarivier Manely
↑ Mao's paternal grandmother and Luo's paternal grandfather were siblings
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1 2 Also half-uncle and half-niece
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Also uncle and niece
↑ Traditio 23. Canonical Implications of Richard III's Plan to Marry His Niece. Kelly, H.A. 1967 pp. 269-311.
↑ Les Cahiers de Saint Louis. Dupont, Jacques and Saillot, Jacques. 1987. Angers et Nantes, p. 755. (In French).
↑ Europäische Stammtafeln Neue Folge. Armagnac, Cte d' (Lomagne). Schwennicke, Detlev, editor. Volume III, Section 3, Table 571. (In German)
↑ Also aunt and nephew
↑ "King Tutankhamun: Latest Tests Prove the Boy Pharaoh was Product of Incest; from google (tutankhamun incest) result 1".
↑ Both were great-grandchildren of the Jiaqing Emperor
↑ Both were great-grandchildren of General Dugu Xin
↑ His father (Emperor Gaozong) and her mother (Princess Changle) were siblings.
↑ They were both grandchildren of Emperor Gaozu of Tang and his wife Duchess Dou
↑ Xue Shao was the son of Princess Chengyang, Emperor Gaozong's sister, by her second husband Xue Yao
1 2 Both were grandchildren of Wu Shihuo, Duke Ding of Ying.
↑ Eldest son of Wu Zetian's nephew Wu Chengsi, Prince Xuan of Wei.
↑ Both were great-grandchildren of Wu Shihuo, Duke Ding of Ying. Princess Anle was the granddaughter of Wu Shihuo's second daughter Empress Wu Zetian, while Wu Chongxun was the grandson of Wu Shihuo's elder son Wu Yuanqing.
↑ Second son of Wu Zetian's nephew Wu Chengsi, Prince Xuan of Wei.

Incest

Laws regarding incest

Culture

Theory

Science	Coefficient of relationship Genetic sexual attraction Inbreeding depression Pedigree collapse

Psychology	Electra complex Jocasta complex Oedipus complex Phaedra complex Westermarck effect

Cases

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