Roger then married Adelaide de Le Puiset, by whom he had one son, Everard, who entered the Church.
see:
http://freepages.genealogy.rootsweb.ancestry.com/~dearbornboutwell/fam5955.html

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EVERARD de Montgommery (-before [1135/36]). He is named and his parentage given by Orderic Vitalis, saying he "was well-educated and remains to this day among the royal chaplains in the household of the kings of England" and in another passage that he "served as a clerk among the humbler officers in King Henry's chapel".