Royal intermarriage is the practice of members of ruling dynasties marrying into other reigning families. It was more commonly done in the past as part of strategic diplomacy for national interest. Al
The Habsburg Philip II of Spain and his wife, the Tudor Mary I of England. Mary and Philip were first cousins once removed.
The wedding of Nicholas II of Russia and Alix of Hesse (whose name was changed to Alexandra Feodorovna in the process), second cousins through their shared great-grandparents Louis II, Grand Duke of Hesse, and Wilhelmine of Baden
Louis XIV of France and Philip IV of Spain meeting at the Isle of Pheasants for the signing of the Treaty of the Pyrenees, which, in part, arranged the marriage of Louis with Philip's daughter Maria Theresa.
The wedding photo of Korean Crown Prince Un and Japanese Princess Masako of Nashimoto
Charles II was King of Spain from 1665 to 1700. The last monarch from the House of Habsburg, which had ruled Spain since 1516, his death without children resulted in the 1701 to 1714 War of the Spanis
Royal intermarriage
…the eleven marriages contracted by Spanish monarchs between 1450 and 1661, nine contained some element of consanguinity. The last of the Spanish line, Charles II—who was severely disabled from birth and possibly impotent— possessed a genome comparable to that of a child born to a brother and sister. The House…
Portrait by Juan Carreño de Miranda, c. 1685
Charles as a child, c. 1673
Mariana of Austria by Diego Velázquez, c. 1656, Regent for Charles during his minority
Charles's illegitimate half-brother, John Joseph of Austria, whose political feud with his mother undermined the stability of his regime