| | Simon II de Dammartin 1180–1239 Marie Jeanne de Ponthieu 1189–1250 | | |
| | Alberic "Alberic III" de Dammartin 1135–1200 Mahud de Clermont 1150–1200 | | |
| | Alberic "Alberic II" de Dammartin 1110–1183 | | |
| | Gilbert Bassett 1095–1165 | | |
| | Robert d' Oilly 1065–1142 | | | | Forne Greystoke 1055–1129 | | |
| | | | | | | Gilbert d' Oilly 1014–1065 |
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