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 mentioned in the Domesday Book of 1086. From that time it was the "caput" of the Feudal barony of Dunster. The Castle was remodelled on several occasions by the Luttrell family who were lords of the manor from the 14th to 20th centuries. The benedictine Dunster Priory was established in about 1100. The Priory Church of St George, dovecote and tithe barn are all relics from the Priory. The village became a centre for wool and cloth production and trade, of which the Yarn Market, built by George Luttrell (d.1629), is a relic. There existed formerly a harbour, known as