Enguerrand I Isembart de Ponthieu
He died on December 9th, 1046.

 Adelaide de Gand
She died about 1045.

 Aleida De Ponthieu
Aleida was born about 1012.

 Hugues II de Ponthieu
Hugues II was born about 1014.  He died on November 20th, 1052.  He was buried in Saint-Riquier.