Hildegarde of Burgundy Duchess of Aquitaine and Countess of Poitiers (1056–1104) Parents Ermengarde of Anjou, Duchess of Burgundy Robert I of Burgundy Helena of Semur Children Guillaume IX Beatrix of Poitiers Agnes of Aquitaine, Queen of Aragon and Navarre Siblings Fulk le Réchin Geoffrey III of Anjou Henry of Burgundy Constance of Burgundy Hildegarde de Gâtinais Simon de Bourgogne Robert de Bourgogne Hugues de Bourgogne Partners William VIII, Duke of Aquitaine