 Godffrey succeeded his father in 1080, receiving the Percheron fields of his father (Mortagne-au-Perche and Nogent-le-Rotrou), while his younger brother Hugues received Châteaudun.A third brother, Rotrou, acquired by marriage the lordship of Montfort-le-Rotrou.He participated in the conquest of England and fought at the Battle of Hastings.