Marguerite de Poitiers
Marguerite de Poitiers, or Marguerite de Valentinois, was the daughter of Aymar V de Poitiers, count of Valentinois, and Sibylle des Baux. On 31 December 1330 she became the second wife of Jean II de Beaumont, vicomte of Beaumont in Maine, and died in 1380.