The following is excerpted from a post to SGM, 23 Sep 2002, by Ivor West:
From: Ivor West (inw@@freeuk.com)
Subject: Re: Cardinan barony
Newsgroups: soc.genealogy.medieval
Date: 2002-09-23 14:53:31 PST
I'm not sure, myself, about a sister of Robert de Beauchamp being the wife of Richard fitz Turolf - the Beauchamp sister seems to belong to the generation of Richard's grandchildren, that is, as the wife of Richard fitzWilliam, Sheriff of Cornwall 1207, younger brother of Robert fitzWilliam (3). That would make her Matilda fizIve, sister of Robert de Beauchamp (c.1130-c.1190). A wife for a Domesday tenant like Richard fitz Turolf would seem to require her to be a sister of the progenitor of the Beauchamps of Hatch, Robert fitz Ivo, Constable of Robert, Count of Mortain.
Ivor West
Note: I have a much earlier Robert de Beauchamp of Hatch in my ancestry, son of Robert FitzIvo. Ivor is probably referring to the Robert Beauchamp of Hatch who was b. c 1191, which is too late to be the brother.