Sibylle des Baux

Sibylle des Baux (died 1360) was the daughter of Bertrand des Baux, Angevin count of Avellino, and married Aymar V de Poitiers, count of Valentinois and Diois, as his second wife; the two were first cousins. Her husband dowered her with castles in the Vivarais and Upie in the Valentinois.

She bore his heir Louis I, the bishops Guillaume of Langres, Henri of Troyes and Otton of Verdun, and other children. Widowed in 1339 or 1340, she died in 1360.