'Cadfan ap Iago' (c.
580–
625; reigned from c.
615) (
Latin: Catamanus;
English: Gideon) was a King of
Gwynedd. The son of
King Iago, he assumed the crown of Gwynedd probably around
615, shortly after the
Battle of Caerllion (today's
Chester), during which the forces of Powys were defeated by
Æthelfrith of Bernicia.

King Cadfan's gravestone in Llangadwaladr church. The inscription reads "Cadfan, the wisest and most renowned of all kings."[ The Oxford Illustrated History of the British Monarchy, , John, Cannon, Oxford University Press, 1997, ]
Cadfan was generally considered to have been a wise and just ruler, noted for his ability to maintain the rule of law and peace during an increasingly hostile period in
British history. His memorial stone at
Llangadwaladr Church in
Anglesey refers to him as "Catamanus rex sapientisimus opinatisimus omnium regum" (="King Cadfan the wisest and most renowned of all kings"). He was succeeded by his son
Cadwallon.
He was one of the last of the
legendary Kings of the Britons as accounted by
Geoffrey of Monmouth.
References