Agnes de Gaunt; m. William de Mohun, adult by 1131, d. in or before 1155, Earl of Somerset, held barony of Dunster, Somerset, son of Sir William de Mohun, d. after 1190, lord of Dunster, Somerset, Sheriff of Somerset 1084 & 1086, by his wife Adeliz. The proof of Agnes de Gaunt's identity is the manor of Whichford, co. Warwick, a Gaunt family property, which she received in her maritagium. Agnes and her husband William de Mohun later gave the church at Whichford to Bridlington Priory, which priory was founded by Agnes' father, Walter de Gaunt. [Ancestral Roots]
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He [William de Moion] married Agnes, daughter of Walter DE GANT. He d. probably in or before 1155. Stephen did not recognise his Earldom, and as Henry II did not grant a new charter to William or his son, the Earldom of Somerset (so far as it existed) lapsed at or before his death. [Complete Peerage XII/1:37-9, (transcribed by Dave Utzinger)]
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The following post to SGM, 6 Nov 2001, by Douglas Richardson, indicates that, despite the fact that Ancestral Roots indicates the mother is Maud of Brittany, Agnes is daughter of an unidentified first wife:
From: Douglas Richardson (royalancestry@@msn.com)
Subject: Re: Alice Mohun's royal ancestors
Newsgroups: soc.genealogy.medieval
Date: 2001-11-06 09:33:36 PST
Dear James,
I think if you check the chronology, you'll find that Agnes de Gaunt (your #33), wife of William de Mohun, can't possibly be the daughter of Walter de Gaunt's marriage to Maud of Brittany. Rather, it appears that Agnes was either Walter's daughter by a hitherto unidentified first wife, or Walter's sister. This matter deserves further study.
This correction comes courtesy of my good friend, Elma Bradshaw, of Salt Lake City, who recently pointed out the Gaunt-Mohun chronology problem to me. Elma is a former employee of the Medieval Families Unit here at the Family History Library in Salt Lake City. I was interested in the problem as I descend from the Mohun family through my immigrant ancestress, Agnes (Harris) (Spencer) Edwards, of Hartford, Connecticut. Elma graciously shared her findings with me.
Mutual cooperation is a timeless value. It's also one of the keys to success in genealogy.
Best always, Douglas Richardson, Salt Lake City, Utah
E-mail: royalancestry@@msn.com