| Hildouin IV Count of Montdidier |
| Father: Hildouin III Count of Montdidier | Mother: |
| Born: abt 1021 of Montdidier, Somme, France |
Died: 1063 |
| Spouse: Alice (Adela) De Roucy | Married:
1031 |
| Children:
Beatrice De Montdidier Adelheid De Roucy Felicitas Queen of Aragon Margaret (Marguerite) De Montdidier | Brothers & Sisters: |