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"
Feudal barony of Dunster War he made Dunster Castle available for use as a convalescent home by the Royal Navy. On the death of his father in 1944 the payment of a large sum in Death Duties left the estate indebted and uneconomic to operate, and Geoffrey, whilst reserving a tenancy for himself at the Castle, sold the estates to a property development company which sold them on to the Commissioners of Crown Lands. He bought back the Castle and grounds in 1954 and opened them to the paying public. He died in 1957 and his widow remained at the Castle until her death