Gautier (or Walter) III, Count of the Vexin (d.1063), married Biota of Maine (d.1063), daughter of Herbert I of Maine, they both died in suspicious circumstances in the captivity of William Duke of Normandy, the future William I of England.
Historians disagree about the date of her death. Heather Tanner dates it c.1047 and says that Eustace remarried c.1049,[2] whereas Elisabeth van Houts dates her death c. 1056.[3] According to David Bates, the marriage between Godgifu and Eustace was criticised for unspecified reasons at the Council of Reims in 1049, which was presided over by the Pope. This seems to have resulted in an end to the marriage and her return to England, where she was treated generously by her brother.[4]