- 1John, 6th Earl of Mar, was one of the leaders of the Jacobite rebellion in 1715-6, and he proclaimed James Edward Stuart (the Old Pretender) king of Great Britain on September 6, 1715. When the rebellion collapsed in 1716 he fled with Charles Edward to France and Rome, before he lost favour at the pretender's court. He died in Aachen, Germany, in May 1732.