John Stewart, 1st Earl of Atholl (1566–1603)
John Stewart, 1st Earl of Atholl (1566-1603) was a Scottish landowner. He was the sixth Lord Innermeath and made Earl of Atholl in 1596.
His parents were James Stewart, 5th Lord Innermeath and Helen Ogilvy, a daughter of James Ogilvy, Lord Airlie, and Helen Sinclair. His uncle was the court poet, John Stewart of Baldynneis.
In 1580, John Stewart married Margaret Lindsay, daughter of David Lindsay, 9th Earl of Crawford and Katherine Campbell.
In February 1592 his brother Robert Stewart had been a servant of their kinsman, the young James Stewart, 2nd Earl of Moray. In March 1592, in retribution Robert stole a trunk of money belonging to George Gordon, then Earl of Huntly, and twice tried to assassinate him by entering his house in disguise armed with a pistol.