William de Mohun of Dunster, 1st Earl of Somerset William de Mohun of Dunster, 1st Earl of Somerset William de Mohun of Dunster, Earl of Somerset (c. 1090 – c. 1155), 2nd feudal baron of Dunster, 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". William was the son of William de Moion, who was seigneur of Moyon which is close to Saint-Lô. The elder William was High Sheriff of Somerset in 1084. During the war between Matilda and Stephen, Stephen marched against Mohun's castle at Dunster, but
Dunster Castle be slighted to prevent their further use. In the 1860s and 1870s, the architect Anthony Salvin was employed to remodel the castle to fit Victorian tastes; this work extensively changed the appearance of Dunster to make it appear more Gothic and Picturesque. Following the death of Alexander Luttrell in 1944, the family was unable to afford the death duties on his estate. The castle and surrounding lands were sold off to a property firm, the family continuing to live in the castle as tenants. The Luttrells bought back the castle in 1954, but in 1976 Colonel Walter Luttrell gave Dunster