William married Mathilde D' Anjou, [DUCHESS OF NORM in Jun 1119 in , Angers, Maine-Et-Loire, France. Mathilde (daughter of Foulques V "le Anjou King Of Je, USALEM and Ermengarde (Ermentrude) Du Maine, [Countess of Anj) was born about 1104 in Of, Angers, Maine-Et-Loire, France; died in 1154 in Fontevrault Abbe, Fontevrault, Maine-Et-Loire, France. [Group Sheet] [Family Chart]