Hildouin De Ponthieu
Hildouin was born in 0907.  He died at the age of 74 in 0981.

 Hersinde De Dammartin
Hersinde was born before 0940 in Ponthieu, Ain, France.  She died after 0970.

 Hugues I Ponthieu
Hugues I was born about 0956 in Montreuil, France.  He died about 1000.

 Hildouin Breteuil
Hildouin was born about 0970 in Breteuil, Eure, France.  He died about 1060.