Enguerrand de Ponthieu I
Enguerrand was born in 0980.  He died at the age of 66 on December 9th, 1046.

 Adela of Holland
Adela was born in 0987.  She died at the age of 65 on November 20th, 1052.

 Hugh de Ponthieu II
Hugh was born in 1005.  He died at the age of 47 on November 20th, 1052.