Sir John Wedderburn of Ballindean, 6th Baronet of Blackness (1729–1803) was a Scottish landowner who made a fortune in slave sugar in the West Indies. Born into a family of impoverished Perthshire gentry, his father Sir John Wedderburn, 5th Baronet of Blackness, was executed for treason following the Jacobite uprising of 1745, and the young Wedderburn was forced to flee to the West Indies, where he eventually became the largest landowner in Jamaica, making his money in slave sugar. In 1769 he returned to Scotland with a slave, one Joseph Knight, who was inspired by Somersett's Case, a judgement in London determining that slavery did not exist under English law. Wedderburn was sued by Knight in a freedom suit, and lost his case, establishing the principle that Scots law would not uphold the institution of slavery either. Wedderburn ended his days as a wealthy country gentleman, having restored his family fortune and recovered the title Baronet of Blackness.