Background
William was a son of Robert II Archbishop of Rouen and Count of Évreux and Herlevea.
William was a son of Robert II Archbishop of Rouen and Count of Évreux and Herlevea.
The Devereux family had lands at Lieuvin and Baiocasino in the pays d'Auge. William married, c. 1040, Hawisa d'Échauffour, widow of Robert de Grandmesnil and daughter of Giroie, Lord of Échauffour and Gisle de Montfort-sur-Risle. Hawise eventually retired to become a nun at Montivilliers along with two of Judith's half-sisters.
Together William and Hawisa had a daughter:
Judith d'Évreux († 1076), married Roger I of Sicily
The Devereux family in England which gave rise to the Viscounts of Hereford claims descent from the Norman family of d'Évreux. As William d'Évreux's older siblings are well documented to have had no surviving male heirs, William provides the only potential source of this connection. One source claims that William, by an unidentified woman, was the father of:
Roger Devereux.
As a member of the comital dynasty of Evreux, he was probably a supporter of Duke William during his consolidation of control in Normandy. He may also have been a member of the clergy as later generations of Devereux were hereditary chaplains to King Henry and King Stephen, and identified as members of the early form of the Exchequer in Normandy.
