Guillaume Ier de Montfort
Pour un autre, non
- Deceased in 1157
Parents
- Raoul III de Gaël, chevalier, comte de Breteuil
- Havoise de Hédé, dame de Hédé
Family
- Married with Amice de Porhoët, issuing
- Raoul IV ( - 1162)
- Geoffroy Ier ( - 1181)
- Amauri