Jean I , COunt Of Ponthieu De Ponthieu
Jean I , COunt Of Ponthieu was born in 1135.  He died at the age of 56 in 1191.

 Beatrice De St. Pol
Beatrice De was born in 1135.  Beatrice De is no longer alive.

 III, Count De Ponthieu William
III, Count De Ponthieu was born in 1179.  He died at the age of 42 in 1221.