Francisco de Asís, Duke of Cádiz

Francisco de Asís de Borbón was King of Spain as the husband of Queen Isabella II from their marriage in 1846 until Isabella's deposition in 1868. Francisco and his wife were double first cousins, as their fathers were brothers and their mothers were sisters. Isabella was deposed in the Glorious Revolution of 1868, but the monarchy was restored under their son Alfonso XII in 1874.