Hildouin III Comte deMontdidier
Hildouin III Comte was born about 0980.  He died after 1037.

 Lessine deHarcourt
Lessine was born about 0980.

 Hildouin IV Comte deMontdidier
Hildouin IV Comte was born in 0998 in Montdidier,Picardy,France.  He died at the age of 71 in 1069.