abt 1066 – 13.10.1119
Mother: Havoise de Rennes, Comtesse de Rennes † 19.08.1072
Married 01: Constance de Normandie, abt 1057 – 13.08.1090
Father: Guillaume II de Normandie, Duc de Normandie, King of England (William I) 1027/8 – 09.09.1087
Mother: Mathilde de Flandre, abt 1032 – 02.11.1083
No issue.
Married 02: Ermengarde d'Anjou, abt 1072 – 01.06.1146
Father: Foulques IV d'Anjou, Comte d'Anjou et de Tours abt 1043 – 14.04.1109
Mother: Hildegarde de Beaugency, abt 1043 – abt 1070
Child 01: Conan III de Cornouaille, Duc de Bretagne 1095/6 – 17.09.1148
Child 02: Geoffroy de Cornouaille, † 1116
Child 03: Havoise (Agnès) de Counouaille
Child by: unknown
Child 04: Brian FitzCount, Lord of Abegavenny 1119 - abt 1142