The de Roquefeuil-Blanquefort family previously named de Blanquefort is a French noble family from Aquitaine and Rouergue whose proven filiation began in 1393 when Jean of Blanquefort married Catherine de Roquefeuil-Anduze.

The proven filiation began of the Roquefeuil-Blanquefort family in 1393 when Jean of Blanquefort married Catherine de Roquefeuil-Anduze[1] La Chesnaye-Desbois writes in the 18th century that according to an ancient memoir Jean de Blanquefort could descend from the youngest member of the family de Roquefeuil who received the lordship of Blanquefort, but there is no evidence for this.

[3] Louis de La Roque writes in Bulletin de la Société héraldique et généalogique de France (1879): In Guyenne there tere were three lordships whose names were Blanquefort, one in Médoc, one in Agenais and the third one near l'Isle-Jourdain.

Settled in Montpeyroux the branch owned the castle du Bousquet and included several officers and sailors.

Branch of Cahuzac : Ancestry from Roquefeuil to the Rockefeller family are suggested, via Goddard Rockenfeller (born 1590) [6]