Hildouin IV Comte de MONTDIDIER
Hildouin IV Comte de was born about 1011 in Montdidier, Somme, France.  He died in 1063.

 Alice Adela de ROUCY
Alice Adela de was born about 1014 in Roucy, Aisne, France.  She died in 1063.

 Margaret (Marguerite) de MONTDIDIER
Margaret (Marguerite) de was born about 1035 in Montdidier, Somme, France.  She died about 1110.