| | Robert de Ferrers 1108–1157 Countess Margaret de Peverel 1114–1154 | | | | Earl Robert de Ferrers 1070–1139 Hawise de Vitre 1088–1139 | | | | Sir Henry de Ferrers 1036–1088 Bertha FitzRobert de Aigle 1044–1095 | | | | Walchelinde Hilaire de Ferrers 1010–1089 Emma of Normandy 1010–1052 | | |
| | | Engenulphe FitzRobert 1008–1066 Richeride Richvaride 1010–1044 | | |
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| | | Andre Berenger de Vitre 1054–1139 Agnes de Mortaigne 1066–1120 | | | | Rivallon Berenger de Vitre 1013–… Genergan de la Vicaire 1017–… | | |
| | | Count Robert de Mortaigne 1031–1095 Maud de Montgomery 1041–1084 | | |
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| | | William Peverel 1080–1155 Avice de Lancaster 1088–1149 | | | | William Peverel 1050–1113 Adelina de Lancaster 1050–1120 | | | | King William I of England 1024–1087 Countess Matilda of Flanders 1031–1083 Maud de Ingelrica 1032–1083 | | |
| | | Enguerrand II de Ponthieu 1025–1053 Adelaide of Normandy 1021–1058 | | |
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| | | Roger de Montgomery 1058–1123 Countess Almodis de la Marche 1062–… | | | | Roger de Montgomery 1020–1094 Mabel Talvas of Belleme 1022–1079 | | |
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