William IV, Count of Ponthieu
Birth:	1179
Death:	4 October 1221
Father:	John I, Count of Ponthieu (c1140-1191)
Mother:	Beatrice de Saint-Pol (?-?)
Spouse:	Alix de Vexin (c1170-c1220)
Sex:
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William IV, Count of Ponthieu was born 1178 to John I, Count of Ponthieu (c1140-1191) and Beatrice de Saint-Pol (?-?) and died 27 September 1221 of unspecified causes.

Contents 1 Children 2 Siblings 3 Siblings 4 Contributors 5 Sources and notes

Children

Offspring of William IV, Count of Ponthieu and Alix de Vexin (c1170-c1220)
Name	Birth	Death	Joined with
Jean de Ponthieu
Marie de Ponthieu, Countess of Montreuil (1199-1251)	10 April 1199	1250	Simon de Dammartin, Count of Ponthieu (1180-1239) Mathieu de Montmorency, Seigneur d'Attichy
Isabelle de Pnthieu
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Siblings

Siblings

Contributors

• William Allen Shade 03:42, 18 August 2009 (UTC)

Sources and notes