Robert held lands in Guerny and Vesly in Normandy. He belonged to a branch of the
Tosny family that originated near
Eure in Normandy. His exact relation to the Tosny family is unclear, but it has been suggested that he was a younger brother of
Roger I of Tosny. He had a (probably elder) brother named Berengar Hespina and a sister named Bertha, who married Guy I of Laval. ==Life==