Hildouin IV Count Of Montdidier
Hildouin IV was born about 1021 in Montdidier, France.  He died in 1063.

 Alice de Roucy
Alice was born in 1014 in Roucy, Aisne, France.  She died at the age of 49 in 1063.

 Marguerite De Montdidier Countess Of Clermont
Marguerite De Montdidier was born in 1035 in Montdidier, Somme, France.  She died at the age of 75 in 1110 in Clermont, Oise, France.

 Beatrice Of Montdidier
Beatrice Of was born about 1051 in Montdidier, Picardy, France.