Cuilén of Scotland

Cuilén mac Ilduilb, anglicised Colin (died 971), son of Indulf and nicknamed An Fionn, ‘the White’, ruled Alba from 967. After challenging Dub he was defeated in 965, but Dub was expelled and killed in 967.

In 971 he was slain by Britons of Strathclyde; the killer was Rhydderch ap Dyfnwal, whose daughter the king had abducted. Kenneth II succeeded him, and Cuilén's son later reigned as Constantine III.