ROGER [I] de Montgommery, son of --- (-[before 1048]). Seigneur de Montgommery and Vicomte de l'Hiémois. He witnessed a charter of Robert I Duke of Normandy for the abbey of Saint Wandrille dated [1031/32]. In [1028/35] he restored to the Abbey of Jumièges the market at Vimoutiers which he had taken from the monks[436]. Guillaume of Jumièges records that “Rogeri[us] de Montegumeri“ had been exiled to Paris “pro perfidia sua” when [his son] “Willelmo Rogerii de Montegumeri filio” murdered “Osbernus...Herfasti Gunnoris comitissæ fratris filius”[437].
m JOSCELINE, daughter of --- & his wife Sainsfrida [Senfrie][438] . Josceline, her husband and her mother are named in a letter of Ives Bishop of Chartres to Henry I King of England dated 1114 which explains the consanguinity between the king and Hugues de Châteauneuf, who wanted to marry one of the king's illegitimate daughters[439].
Roger & his wife had [six] children