Martin Coles Harman (1885 – 5 December 1954) was an English businessman who, in 1925, bought the island of Lundy and proclaimed himself King. Born in Steyning in Sussex and educated at Whitgift School in Croydon, Harman had six brothers and five sisters. At the age of 16, he left school to work for Lazard, and became an influential figure in early 20th-century corporate finance in the City of London. In June 1919, Harman moved to Chaldon, Surrey, where he lived with his wife Amy Ruth Harman (née Bodger) and their four children. In 1926, he donated land he owned in the village to the National Trust which was subsequently named "Six Brothers Field" at his request.