Françoise of Châtillon

Frances de Châtillon was Countess of Périgord, Viscountess of Limoges, and Dame of Avesnes and Châlus. She was the eldest daughter of William, Viscount of Limoges and Isabelle de La Tour d'Auvergne. In 1470, she married Alain the Great, Count of Graves and Viscount of Tartas, son of Jean I of Albret and Catherine of Rohan. Through her father, Frances had a claim on the throne of Brittany through the Penthièvre line. She is also said to be the mistress of Pope Clement V, while he stayed at Avignon.