*Guillaume III Comte de Ponthieu
born 1179 Ponthieu, Flandres, France
died 4 October 1221 France

father:
*Jean I Count of Ponthieu & Montreuil
born Abt 1135 Montreuil, Flandres, France
died 30 June 1191 Acre, Palestine

mother:
*Bâeatrice De Saint Pol
born Abt 1135 Of, Saint Pol, France

siblings:
*Adele de Ponthieu born about 1175 France died 15 November 1251

spouse:
*Alix Princess of France
born Abt 1170 France
died 1221
married 20 Aug 1195 Castile

children:
*Marie (Jeanne) Countess of Ponthieu & Montreuil
born 17 Apr 1199 Of, Aumale, Normandie
died Sep 1250 Normandie
married Abt 1212 Aumale, Seine-Maritime, France

biographical and/or anecdotal:

notes or source:
LDS