Fastradus d'Oisy-Avesnes 1075–1111 | | |
| | Ada Ramerupt-Montdidier 1047–1121 Theodoric d'Avesnes 1050–1106 | | |
| | Hildouin Ponthieu-Montdidier 998–1063 | | | | Hildouin Ponthieu-Ramerupt 975–1031 Lesselina de Torqueville 970–1030 | | | | Hildouin Ponthieu-Montdidier 951–992 | | | | Gertrude de Bassigny 910– | | |
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