Stuart or Stewart, Alexander, duke of Albany, 1454?–1485, Scottish nobleman; second son of James II of Scotland. He was captured (1463) by the English while he was at sea en route to the Low Countries but was soon released. He became high admiral of Scotland, warden of the marches, and lieutenant of the kingdom. In 1479, however, his brother James III, suspecting Albany of plotting against the throne, had him imprisoned. Albany escaped to France and thence went to England, where he concluded (1481) a treaty with Edward IV, by which the English king agreed to recognize Albany as king of Scotland if the latter became his vassal. An English army invaded Scotland (1482), but Albany was persuaded by some of the Scottish nobles to renounce his pretensions to the throne in return for the restoration of his estates. He was briefly reconciled with James, but in 1483 he was sentenced to death and fled to England. After raiding Scotland in 1484, he went to France, where he was accidentally killed in a tournament.