Baron Mohun of Okehampton

Baron Mohun of Okehampton was a title in the Peerage of England. It was created on 15 April 1628 for John Mohun, formerly a Member of Parliament for Grampound, Cornwall.

The family was formerly seated at Hall in the parish of Lanteglos-by-Fowey in Cornwall, and was a junior branch of the Mohun family, feudal barons of Dunster, of Dunster Castle in Somerset, of whom the first member, the warrior William de Moyon (died post 1090), had come over with William the Conqueror during the Norman Conquest of 1066. The family of Mohun of Hall was also seated at Bodinnick (alias Bodinnoc, etc.) also in the parish of Lanteglos-by-Fowey and later at Boconnoc, both in Cornwall, and was one of the four co-heirs of Edward Courtenay, 1st Earl of Devon (1527–1556), feudal baron of Plympton, feudal baron of Okehampton, etc., of Tiverton Castle, Okehampton Castle, etc., the last of the old Courtenay Earls of Devon. This was due to the marriage of William Mohun of Hall to Elizabeth/Isabel Courtenay, one of the four daughters of Sir Hugh Courtenay (d.1471) of Boconnoc (nephew of Edward de Courtenay, 3rd/11th Earl of Devon (1357–1419), "The Blind Earl"), whose son Edward Courtenay, 1st Earl of Devon (d.1509) was created Earl of Devon following the extinction of the mediaeval Courtenay Earls during the Wars of the Roses. The great-grandson of the latter was Edward Courtenay, 1st Earl of Devon (1527–1556), who died without progeny, one of whose co-heirs was his distant cousin Sir Reginald Mohun (born 1509) of Hall, great-grandson of Elizabeth Courtenay and William Mohun.