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
Feudal barony of Dunster (1303–1377) and widow of Sir John de Vere, son of the Earl of Oxford. In the following year 1375 Lady Mohun's husband died, being the last in the male line of Mohun. In the following year 1376, Lady Mohun completed the transaction, namely that her trustees settled the castle of Dunster, the manors of Kilton, Minehead and Carhampton, and the hundred of Carhampton on Lady Mohun for her life, with remainder to Elizabeth Luttrell and her heirs. Lady Elizabeth Luttrell never lived at Dunster, as she died in 1395 before Lady Mohun's life interest had expired. But Dunster Castle remained