William de Moyon

William I de Moyon (d. post 1090) (alias de Moion, also de Mohun), 1st feudal baron of Dunster in Somerset, was seigneur of Moyon in Normandy and became Sheriff of Somerset in 1086. He founded the English de Mohun family in the Westcountry. Recorded in the Domesday Book of 1086 as a tenant-in-chief of William the Conqueror holding a number of manors in Somerset with caput at Dunster Castle.

The Duchess of Cleveland wrote in her 1889 work Battle Abbey Roll about the origins of the de Mohun (alias Mohon, Moion, etc.) family:

He accompanied William, Duke of Normandy in the Norman conquest of England in 1066. Reputedly with forty-seven or fifty-seven of the greatest lords in the army. The Norman chronicler Wace called him le Viel, (modern French: le Vieux), "the elder", to distinguish him from his son William II de Mohun (d. circa 1155); for as William I de Moion the elder did not die until after 1090 he would not have been considered old in 1066.

He acquired sixty-eight manors in the west of England, one each in Devon, Wiltshire, eleven in Dorset, one of them Ham, which was inherited by his descendants, it was called Ham-Mohun, or Hammoon, and fifty-five in Somerset.

The estate connected to his caput at Dunster consisted of the ancient hundreds of Cutcombe and Minehead, land in Minehead, Cutcomb, and Dunster and some additions making a total 19,726 acres.

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