[1][2] He held lands in Nithsdale[3] (Dalswinton, a Comyn stronghold,[4][5] and Duncow[6]) and Tynedale.

[3] The Comyns were ousted by Alan Durward, but returned to power in 1257-8, before provoking a strong English reaction.

John I was known as the "Red Comyn", the nickname more commonly applied to his grandson.

[14] His first wife was called Eva, and appears to have been the mother of at least his oldest children.

[16][a] Alice was the daughter of William de Roos of Helmsley and Lucy FitzPiers.