I Jean
I was born about 1145 in Montreuil, Flandres, France.  He died on June 30th, 1191 in Acre, Palestine.

 Beatrice De Saint Pol
Beatrice De was born about 1150 in Saint Pol, Artois, France.  She died after 1204.

 Adele De Ponthieu
Adele was born about 1170 in Ponthieu, France.

 Guillaume IV Talvas
Guillaume IV was born about 1179 in Ponthieu, Flandres, France.  He died on October 4th, 1221 in France.

 Marguerite De Ponthieu
Marguerite was born about 1180.