Ermengarde married Aquitaine, Duke Of Aquitaine Guillaume IV 1089; divorced Yes, date unknown. Guillaume (son of Aquitaine, Duke of Aquitaine William III and de Bourgogne, Princess Of France Hildegarde (Aldegrade), son of Duke/Aquitaine Guillaume III / I and de Normandie, Princess Adele) was born 22 Oct 1071, of, Aquitaine, , France; died 10 Feb 1126, France. [Group Sheet]