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 county constituency represented in the House of Commons of the Parliament of the United Kingdom. It elects one Member of parliament (MP) by the first past the post system of election, and is part of the South West England constituency of the European Parliament; the constituency elects seven MEPs using the d'Hondt method of party-list proportional representation. Dunster Castle was positioned on a steep, high hill. Geologically, the hill is an outcrop of Hangman Grits, a type of red sandstone. During the early medieval period the sea reached the base of the hill, close to the mouth of the River