Sir Robert Comyn (died 10 February 1306) was a 13th-14th century Scottish nobleman.
He was captured at the battle of Dunbar in 1296, together with his brother Alexander and nephew John and imprisoned.
An argument ensued between the two, with Robert the Bruce stabbing John Comyn.
[1] Bruce's companions raced into the church and killed John Comyn with swords.
Robert Comyn, rushing to aid his nephew, was killed by a blow to the head by Bruce's brother-in-law, Christopher Seton.