| Father | Hildouin IV Count of Montdidier (1021 - ) |
| Mother | Princess Alix Adele (1014 - 1062) |
| Sibling | Margaret Marguerite De Montdidier (1045 - 1110) |
| Sibling | Ada Of Ramerupt (1060 - 1121) |
| Sibling | Adelheid De Roucy (1054 - 1114) |
| Sibling | Alix De Roucy (1035 - 1068) |
| Sibling | Beatrice of Montdidier of Perche (1037 - 1129) |
| Sibling | Hugues De Roucy (1054 - ) |
| Sibling | Beatrix De Montdidier Rameru (1054 - ) |
| Sibling | Elisabeth De Crécy (1055 - ) |
| Sibling | ? (1060 - ) |
| Sibling | Andre , Lord of Rameru De Rouci (1050 - ) |
| Sibling | Felicia Of Roucy (1060 - 1123) |
| Sibling | Adela Agnes De Ramaeru (1032 - 1069) |
| Sibling | Ermentrude Rheims- Roucy [ Countess Of] (1050 - 1102) |
| Sibling | Ada De Montdidier Dite De Roucy (1051 - 1135) |
| Sibling | Andre De Roucy (1040 - 1092) |