d in the negotiations that followed Alan IV was forced into marriage with King William I's second daughter Constance of England. The marriage ceremonies may have taken place in Bayeux in Normandy. William of Malmesbury wrote that Constance was unpopular at the Breton court because of her 'severe and conservative' manner. William of Malmesbury also alleged that Alan IV had Constance poisoned to death, but this was unverified However, Orderic Vitalis wrote that as duchess, Constance did all she could to further the welfare of the Bretons, who grieved deeply at her death in 1090. In 1092, Alan IV donated property to Redon Abbey by charter, and by 1093, married his second wife, Ermengarde of Anjou as part of a political alliance with Fulk IV, Count of Anjou to counter Anglo-Norman influence. With Ermengarde, he had a son, Geoffrey, who died young, Conan III, and a daughter Hawise. Hawise was married to count Baldwin VII of Flanders. In 1098, Alan IV joined the First Crusade, leaving Brittany under the regency of his wife Ermengarde of Anjou until his return early in the 12th century. Ermengarde ruled from Nantes rather than Rennes, as it was closer to her home county of Anj