Ceredig ap Cunedda (died 453), was a possibly fictional or at least not well attested in reliable sources king of Ceredigion in Wales.

[1] He may have been born c. 420 in the Brythonic kingdom of Manaw Gododdin (modern Lothian in Scotland), centred on the Firth of Forth in the area known as Yr Hen Ogledd.

One of the sons of Cunedda, grandfather of Saint David,[2] according to Nennius' Historia Brittonum, he arrived in what is now modern Wales from Gododdin with his father's family when they were invited to help ward off Irish invaders.

As a reward for his bravery, his father gave him the southernmost part of the territories in north-west Wales[3] reconquered from the Irish.

[4] Amongst their children was a daughter named Ina who is thought to be the Saint Ina to whom St Ina's Church in Llanina near New Quay, Ceredigion is dedicated, and a son named Sanctus who in legend sexually assaulted Saint Non and is the father of Saint David.