Helisende d'Avranches

-http://fmg.ac/Projects/MedLands/normabc.htm#HelisendeAvranchesMGuil...

iii) HELISENDE d'Avranches . Her marriage is referred to by Orderic Vitalis, who says that she was the sister of Hugh Earl of Chester but does not give her name[125]. The primary source which confirms her name has not yet been identified.

m as his second wife, GUILLAUME [II] Comte d'Eu, son of ROBERT Comte d'Eu & his first wife Beatrix --- (-2 Jan after 1096).