| | Hugh de Avranches 1048–1101 Ermentrude of Clermont 1067–1094 | | | | Viscount Richard de Avranches le Goz 1024–1084 Emma de Conteville 1030–1066 | | | | Judith de Montanolier 995–1020 | | |
| | | Sir Herluin de Conteville 1001–1066 Herleva Arletta de Falaise 1003–1078 | | |
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| | | Hugh de Clermont 1030–1101 Marguerite de Montdidier de Roucy 1040–1110 | | | | Renaud I de Clermont 1005–1098 Ermengardis de Clermont 1010–… | | |
| | | Hildouin III de Rameru 1010–1063 Countess Adele de Roucy 1019–1062 | | |
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