of his death, dependent on the 12th-century Life of Kentigern and an entry in the Annales Cambriae an.CLX+9 Conthigirni obitus...., is unreliable.

The next earliest source is the so-called Iona Chronicle, compiled c. 650-750, deduced from Scottish entries in the Chronicle of Ireland which were later copied into the Annals of Tigernach (AT) and the Annals of Ulster (AU).