Which king married his own daughter

There are historical accounts and legends from various cultures mentioning rulers who allegedly married their daughters or close relatives, though many of these claims are disputed by historians and may be based on propaganda, misunderstandings of royal titles, or exaggerated tales. In ancient Egyptian history, some Pharaohs practiced sibling marriages to keep royal bloodlines pure, though father-daughter marriages are not well-documented as historical fact. In Indian history, some controversial claims have been made about certain rulers, but these often lack credible historical evidence and may stem from politically motivated writings by rivals or later chroniclers.

It's important to approach such historical claims with scholarly skepticism, as many accusations of incestuous relationships were tools of political propaganda used to discredit rulers, particularly during conflicts between kingdoms or after a dynasty's fall. Royal succession, titles, and family relationships in ancient times were complex, and terms like "daughter" or "wife" sometimes had different contextual meanings or were mistranslated over centuries. Modern historians rely on archaeological evidence, contemporary documents, and cross-referenced sources rather than sensational claims to verify such practices. Without specific context about which culture or time period you're asking about, it's difficult to provide a definitive answer, but most verified cases of royal incest involved sibling marriages rather than parent-child relationships, primarily in cultures where maintaining pure royal bloodlines was considered religiously or politically essential.