Another piece of evidence has come to light. It is a description of a document held in the archives of Magdalen College, Oxford.
It is known from other sources that a member of the Beauchamp family was married to Bertha, daughter of William de Braose who died in 1211. This document seemed to imply that her husband was Walter de Beauchamp.
It prompted a lot of discussion on the soc.genealogy.medieval newsgroup in June 2017 but the conclusion was drawn that the wording was not clear enough to rule out the previously held view that Bertha was Walter's mother, rather than his wife.
