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

 Lessine De Harcourt
Lessine was born about 0980.

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