William de Mohun, of Dunster, 1st Earl of Somerset

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William de Mohun, First Earl of Somerset

Also Known As: "Knight"
Birthplace: Dunster Castle,Dunster, Somerset, England
Death: Died in Dunster, Somerset, England
Immediate Family:

Son of Guillaume de Mohun, seigneur de Moyon; Guillaume De Mohun, I; Adeliza de Mohun N.N. and Adeliza De Mohun
Husband of Agnes De Mohun De Gant and Agnes de Gant
Father of William de Mohun
Brother of Geoffrey de Moyon

Managed by: Private User
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About William de Mohun, of Dunster, 1st Earl of Somerset

William de Mohun of Dunster, 1st Earl of Somerset

From Wikipedia: http://en.wikipedia.org/wiki/William_de_Mohun_of_Dunster,_1st_Earl_of_Somerset

William de Mohun of Dunster (c. 1090 – c. 1155) was a favourite of Empress Matilda and a loyal supporter of her in the war against King Stephen, during which he earned the epithet of the "Scourge of the West". Empress Matilda conferred upon him the title Earl of Somerset, in 1141. In the foundation charter of the priory at Bruton he describes himself as "Willielmus de Moyne, comes Somersetensis". Unlike Baldwin de Redvers who was created Earl of Devon by Matilda at around the same time, William's title was not recognised by Stephen or Henry II, Matilda's son, and his descendants did not use the title.

William was the son of William de Moion, who was seigneur of Moyon which is close to Saint-Lô. the elder William was sheriff of Somerset in 1084.

During the war between Matilda and Stephen, Stephen marched against Mohun's castle at Dunster, but finding it too hard to take, he left Henry de Tracy to keep Mohun under siege.

William married Agnes de Gaunt, daughter of Walter de Gaunt and Maud of Brittany, daughter of Stephen, Count of Tréguier.[1]


  1. ^ Frederick Lewis Weis, Ancestral roots of certain American colonists who came to America before 1700, Genealogical Publishing Com, 2004. pg 151. Google ebook


Ancestral Roots of Certain American Colonists Who Came to America Before 1700 by Frederick Lewis Weis; Line 143-24 G. E. C., ed. Geoffrey F. White. The Complete Peerage. (London: St. Chaterine Press, 1953) Vol. XII, Part 1, p. 36-38.


Earl of Dorset William II De Mohun (b. 1100, d. 1155)

William II De Mohun (son of William I De Mohun and Adeliz De Mohun)279 was born 1100 in Dunster, Somerset, England279, and died 1155 in Dunster Castle, Somersetshire, England279. He married Agnes De Gaunt, daughter of Walter De Gaunt and Matilda De Brittany.

Notes for William II De Mohun:

William II and Henry de Tracy supported the Empress Matilda against Stephen and was made earl of Dorset in 1140 and may have been earl of Somerset. William Mohun II's wife Agnes gave Whichford to Bridlington Priory and founded the Priory of Brotonin 1142. He had five sons, four of which were clerks in holy orders.

Children of William II De Mohun and Agnes De Gaunt are:

+William III De Mohun, b. 1132, Dunster, Somersetshire, England279, d. 1176, Dunster, Somersetshire, England279,

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William de Mohun, of Dunster, 1st Earl of Somerset's Timeline

Dunster Castle,Dunster, Somerset, England
Age 36
Somerset, England
Age 59
Dunster, Somerset, England