Feudal barony of Dunster of Dunster, was as follows: William de Moyon (died post 1090) ("alias" de Moion, later de Mohun), Domesday Book holder of Dunster Castle, 1st feudal baron of Dunster, was Seigneur of Moyon near Saint-Lô in Normandy and was Sheriff of Somerset in 1086. He was the founder of the English "de Mohun" family, prominent in the Westcountry, extinct in the male line seated at Dunster in 1375 and extinct in the junior male line seated at Mohuns Ottery in Devon at about the same time. He is recorded in the Domesday Book of 1086 as holding the manor of "Torre"
Dunster Castle with a supply of venison as well as generating income. During the 15th century, England was divided by the prolonged period of civil war called the Wars of the Roses: the Luttrells were supporters of the House of Lancaster. In 1461, Sir James Luttrell died following the Lancastrian defeat at the Second Battle of St Albans, and his family were deprived of their estates by the Yorkist Edward IV. The castle was given to the Herberts, but the Luttrells regained it on the accession of the Lancastarian Henry VII in 1485, when Dunster was restored to James' son, Sir Hugh