The House of Roquefeuil-Blanquefort is an old French noble family originating in the late 14th century through the union of the Roquefeuil and Blanquefort families. Proven filiation began in 1393 when Jean of Blanquefort married Catherine de Roquefeuil. Established in the region of Rouergue and Guyenne, the family gained prominence through military leadership, naval service, and regional governance. Notably, they are associated with the construction of the Château de Bonaguil, one of the last and largest medieval fortresses in France. Over the centuries, members of the family have held high-ranking positions such as vice-admirals of France, governors, and royal chamberlains, and their noble status was confirmed multiple times during the Ancien Régime. The Roquefeuil-Blanquefort family is a member of the Society of the Cincinnati.