william gilmour leburn (30 july 1913 – 15 august 1963) was a british company director and conservative member of parliament for kinross and west perthshire from 1955 until 1963. he served in the government of harold macmillan as under-secretary of state for scotland; his sudden death opened the way for macmillan's successor, sir alec douglas-home to return to the house of commons.