Guy I de Ponthieu
Guy I de was born about 1004.  He died in 1101.

 Ada of Amiens Countess
Ada was born about 1045 in Amiens,Somme,France.¹   She died in March 1066.¹ 

 Agnes de Ponthieu
Agnes de was born about 1030 in Ponthieu,Ain,France.²   She died on October 6th, 1100.²