abt 1047 – 27.07.1101
Father: Richard Le Goz, Vicomte d'Avranches abt 1020 – 1082
Mother: Emma de Contville, 1029/32 –
Married: Ermentrude de Clermont, † 1119
Father: Hugues Ier de Clermont, Comte de Clermont-en-Beauvaisis 1030/5 - 1101
Mother: Marguerite de Montdidier, abt 1045 - aft 1103
Child 01: Richard d'Avranches, 2nd Earl of Chester 1094 - 25.11.1120
Children by: unknown
Child 02: Otuer of Chester, † 25.11.1120
Child 03: Robert of Chester
Child 04: Geva of Chester, † aft 1144