[weber.FTW]
Avelina, sister of Gundra, wife of Richard I, Duke of Normandy. [Burke's Peerage]
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The following is excerpted (full post is in notes under father) from a post to SGM, 3 Dec 1996, by Todd Farmerie:
From: Todd A. Farmerie (taf2@po.cwru.edu)
Subject: Robert de Torigny and the family of Gunnor, Duchess of Normandy
Newsgroups: soc.genealogy.medieval
Date: 1996/12/03
Wevia, the only other sister of Gunnor named by Torigny, married Osbern de Bolbec (who is otherwise unknown to history). They had at least two sons: Walter Giffard, ancestor of the English Giffard/Gifford families, and also, through his daughter, of the Clare family; and Godfrey, whose son William de Arques had two daughters and co-heiresses.
Note; I have Wevia's son as Gozeline (or Godfrey) and grandfather of William de Arques.
Maloney, Hendrick & Others - J. H. Maloney