AIDAN (d. 606), king of the Scottish kingdom of Dalriada,
was the son of Gabran, king of Dalriada, and became king after
the death of his kinsman King Conall, when he was crowned at
Iona by St Columba. He refused to allow his kingdom to remain
in dependence on the Irish Dairiada, but coming into collision
with his southern neighbours he led a large force against
AEthelfrith, king of the Northumbrians, and was defeated
at a place called Daegsanstane, probablv in Liddesdale.
Initial text from 1911 encyclopedia -- Please update as needed