John Comyn III

John Comyn III (1274-1306) was a Scottish noble killed in 1306 by Robert the Bruce as Comyn was a rival for the throne.
Murder.
On 10 February 1306 at Greyfriars in Dumfries, Scotland. Comyn was murdered by Robert the Bruce and Roger de Kirkpatrick, due to Comyn claiming the throne due to his claim that he is descended from a previous Scottish king, Donald III (r. 1093-1094, 1094-1097).