Son of Robert Comte d'Evreux, Bishop of Rouen, and his wife Herleva de Rouen. Brother of Richard and Roaul d'Evreux.

married Hawise d'Echaffour

Children:

Judith d'Evreux m. Roger de Hauteville

http://fmg.ac/Projects/MedLands/NORMAN%20NOBILITY.htm

GUILLAUME d'Evreux . He is named as "son of Archbishop Robert" by Orderic Vitalis[1583]. m as her second husband, HAWISE, widow of ROBERT de Grantmesnil, daughter of GIROIE Seigneur d'Enghien & his wife Gisla de Bastenbourg (-10 May ----). Orderic Vitalis names her, gives her parentage, her two husbands and seven children, six by her first marriage, one by her second[1584]. Guillaume de Jumièges names "Hadvise fille de Giroie et veuve de Robert de Grandménil" as wife of "Guillaume frère de Richard [comte d'Evreux et fils de Robert l'archevêque]"[1585]. The necrology of the monastery of Ouche records the death "10 May" of "Haudvisa mater Hugonis de Grentesmesnil"[1586]. Guillaume & his wife had one child:

a) JUDITH d'Evreux (-1076). Orderic Vitalis names her, gives her parentage and records her marriage[1587]. In another passage, the same source specifies that her mother had only one daughter by her second marriage[1588]. Her half-brother Robert de Grandmesnil, Abbé de Saint-Evroul-sur-Ouche, was her guardian. After quarrelling with Guillaume II Duke of Normandy, he fled Normandy with Judith, her brother and sister, first to Rome where he tried to seek redress from the Pope, and then to Robert Guiscard in Apulia who had founded the abbey of Santa Eufemia in Calabria for him[1589]. Malaterra records the marriage "apud Sanctum Martinum" of "abbatum Sanctæ Euphemiæ Robertum…Judicta sorore sua" and Count Roger[1590]. m (San Martino d'Agri Nov 1061) as his first wife, ROGER de Hauteville, son of TANCRED de Hauteville & his [second wife] [Fressenda] ([1031]-Mileto 22 Jun 1101, bur Mileto, Abbey of the Holy Trinity). His brother installed him as ROGER I Count of Sicily in 1072.