<Ul> <Li> Nahor, son of Terah and his niece, Milcah </Li> <Li> Jochebed and her nephew, Amram </Li> <Li> Leonidas, King of Sparta and his half - niece, Gorgo </Li> <Li> Alexander I of Epirus and his niece Cleopatra of Macedon </Li> <Li> Ptolemy VIII Physcon and his niece Cleopatra III of Egypt </Li> <Li> Ptolemy X Alexander I and his niece, Berenice III of Egypt </Li> <Li> Ptolemy XII Auletes and his half - niece, Cleopatra V of Egypt </Li> <Li> Roman Emperor Claudius and his fourth wife and niece, Agrippina the Younger </Li> <Li> Musa ibn Musa, Wali of Zaragoza and Governor of Upper March and his half - niece Assona Íñiguez </Li> <Li> Vietnamese Prince Tran Hung Dao and his consort and paternal aunt, Princess Thien Thanh </Li> <Li> Alfonso X of Castile had a concubinage with his paternal half aunt Maria Alfonso de Leon </Li> <Li> Infante John, Constable of Portugal and his half - niece, Isabel of Barcelos (1424) </Li> <Li> Afonso V of Portugal and his niece, Joanna of Castile (second wife) (1475) </Li> <Li> Jacques of Savoy, Count of Romont and his niece, Marie of Luxembourg, Countess of Vendôme (1484) </Li> <Li> Joanna of Naples and her nephew, King Ferdinand II of Naples (1496) </Li> <Li> Ferdinand II of Aragon and his half - grandniece, Germaine of Foix (second wife) (1505) </Li> <Li> Philip II of Spain and his niece, Anna of Austria (fourth wife) (1570) </Li> <Li> Charles II, Archduke of Austria and his niece, Maria Anna of Bavaria (1571) </Li> <Li> Ferdinand II, Archduke of Austria, and his niece, Anne Juliana Gonzaga (second wife) (1582) </Li> <Li> Chiefess Kapohauola and her nephew, Chief Kaka ʻe </Li> <Li> Maximilian I, Elector of Bavaria and his niece, Archduchess Maria Anna of Austria (1635) </Li> <Li> Prince Maurice of Savoy and his niece, Princess Luisa Cristina of Savoy (1642) </Li> <Li> Karl Eusebius, Prince of Liechtenstein and his niece, Johanna Beatrix of Dietrichstein (1644) </Li> <Li> Philip IV of Spain and his niece, Mariana of Austria (second wife) (1646) </Li> <Li> Leopold I, Holy Roman Emperor and his niece, Margaret Theresa of Austria (1666). </Li> <Li> Voltaire (François - Marie Arouet), lived in concubinage with his niece, Marie Louise Mignot Denis . </Li> <Li> Prince Augustus Ferdinand of Prussia and his niece Margravine Elisabeth Louise of Brandenburg - Schwedt (1755) </Li> <Li> Pedro III of Portugal and his niece Maria I of Portugal (1760) </Li> <Li> Prince Benedetto, Duke of Chablais and his half - niece Princess Maria Ana of Savoy (1775) </Li> <Li> Infanta Benedita and her nephew, José, Prince of Brazil (1777) </Li> <Li> Prince Eugene of Saxe - Hildburghausen and his niece, Caroline of Saxe - Hildburghausen (1778) </Li> <Li> King Kamehameha the Great of Hawai ʻi and his niece, Queen Keōpūolani (c. 1796) </Li> <Li> Sir John Acton, 6th Baronet, Prime Minister of Naples and his niece Marianna Acton (1799) </Li> <Li> Francis IV, Duke of Modena, and his niece, Maria Beatrice of Savoy (titular queen of England and Scotland according to the Jacobite succession) (1812) </Li> <Li> Leopold, Prince of Salerno and his niece, Archduchess Clementina of Austria (1816) </Li> <Li> Infante Carlos, Count of Molina, and his niece, Infanta Maria Francisca of Portugal (1816), and later his niece, Maria Teresa of Portugal (1838) </Li> <Li> Kamehameha II and his half - niece Kalani Pauahi </Li> <Li> Ferdinand VII of Spain and his niece Maria Isabel of Portugal (1816), and later his niece Maria Christina of the Two Sicilies (1829) </Li> <Li> Gustav, Landgrave of Hesse - Homburg and his niece, Princess Louise of Anhalt - Dessau (1818) </Li> <Li> Leopold, Grand Duke of Baden and his half - grand niece Princess Sophie of Sweden (1819) </Li> <Li> Infante Francisco de Paula of Spain and his niece Princess Luisa Carlotta of Naples and Sicily (1819) </Li> <Li> Ernest I, Duke of Saxe - Coburg and Gotha and his niece Duchess Marie of Württemberg (second wife) (1832) </Li> <Li> James Mayer de Rothschild, founder of the French branch of the Rothschild banking family, and his niece Betty Salomon von Rothschild (c. 1825). </Li> <Li> Mongkut and his half grandniece Somanass Waddhanawathy (1851), and his half grandniece Debsirindra (1851), and later his half grandniece Phannarai (1851). </Li> <Li> Svasti Sobhana and his half - niece Abha Barni </Li> <Li> Richard von Metternich (son of the famous Austrian Chancellor) and his niece, Pauline von Metternich (1856). </Li> <Li> Duke Nicholas of Württemberg and his half - niece Duchess Wilhelmine of Württemberg (1868) </Li> <Li> Amadeo I of Spain and his niece, Maria Letizia Bonaparte (second wife) (1888) </Li> <Li> Porfirio Díaz, president of Mexico (1876--80, 1884--1911), and his niece Delfina Ortega Diaz </Li> <Li> Henryk Sienkiewicz, Polish novelist, and his niece, Maria Babska. (1904) </Li> <Li> Klara Hitler, daughter of Johann Pölzl and Johanna Hiedler and Adolf Hitler's mother . Either her grandfather Johann Nepomuk Hiedler or his brother was likely her husband Alois Hitler's biological father . Moreover, Johann was her future husband's step - uncle . Even after they were married, Klara still called her husband "uncle". </Li> <Li> Emperor Jomei and his niece Empress Kōgyoku </Li> <Li> Emperor Kōtoku and his niece Princess Hashihito </Li> <Li> Emperor Tenmu and his niece Empress Jitō, Princess Ōta, Princess Ōe, Princess Niitabe </Li> <Li> Prince Kusakabe and his aunt Empress Genmei </Li> <Li> Emperor Shōmu and his aunt Empress Kōmyō </Li> <Li> Emperor Junna and his niece Princess Seishi </Li> <Li> Emperor Suzaku and his niece Princess Hiroko </Li> <Li> Emperor En'yū and his niece Princess Sonshi </Li> <Li> Emperor Go - Ichijō and his aunt Fujiwara no Ishi </Li> <Li> Emperor Go - Suzaku and his aunt Fujiwara no Yoshiko </Li> <Li> Emperor Hui of Han and his niece Empress Zhang Yan </Li> <Li> Sun Xiu and his niece Empress Zhu </Li> </Ul> <Li> Nahor, son of Terah and his niece, Milcah </Li> <Li> Jochebed and her nephew, Amram </Li> <Li> Leonidas, King of Sparta and his half - niece, Gorgo </Li>

Is it legal to marry your aunt in uk