Jacqueline of Holland (1401-1436), also known as Countess of Hainault, Jacqueline of Wittelsbach, Jacqueline de Bavière, and Jacoba van Beieren. She was the only heiress to her father's great estates, making her an important marital prize. She married first the dauphin of France and then John IV, Duke of Brabant. She fled from the latter to England, where she married Humphrey, Duke of Gloucester. The rest of her life was spent struggling to maintain control of her inheritance.