 John Stewart, Earl of Mar was the youngest son of an unpopular and ineffective what?
John Stewart, Earl of Mar (d. 1503): John Stewart, Earl of Mar (December 1479 – 11 March 1503) was the youngest son of James III of Scotland and Margaret of Denmark. James III of Scotland: James III (10 July 1451/May 1452 – 11 June 1488) was King of Scots from 1460 to 1488.
i don't know