Who was the wife of the king of the Scots who was assassinated on 21 February 1437?
John Stewart, Earl of Mar (d. 1479): John Stewart, Earl of Mar and Garioch (c. 1456–c. 1479) was the youngest surviving son of James II of Scotland and Mary of Guelders. James II of Scotland: James II (16 October 1430 – 3 August 1460), who reigned as king of Scots from 1437 on, was the son of James I and Joan Beaufort.
i don't know