The association with Cadwaladr is a traditional one, without a firm historical provenance.
(as "Kadwaladyr vendigeit", or "Cadwaladr the Blessed").
The red dragon (Welsh: ) has long been known as a Welsh symbol, appearing in the Mabinogion, the Historia Brittonum, and the stories of Geoffrey of Monmouth.
Henken, Cadwaladr was well established as a "prophesied deliverer" of the Britons before Geoffrey's version of his life altered its ending.
This may be because he was seen as the man who would carry forward the achievement of his father Cadwallon, the last great war leader of the Britons: "it is quite likely that the father and son became confused in folk memory, a fusion enhanced by Cadwaladr, whose name is a compound meaning 'battle-leader', also having assumed his father's epithet Bendigaid (Blessed)." Cadwaladr figures prominently in Geoffrey of Monmouth's romantic account of the Historia Regum Britanniae (English: History of the Kings of Britain).
Cadwaladr is told that if he lives a penitent life he will become a saint. When his sacred bones are found and returned to Britain, the Britons (Welsh and Bretons) will be restored to full possession of their homeland.
Cadwaladr and Alan then consult the prophecies of Merlin, and rejoice that this prediction will be fulfilled in future.
Cadwaladr appears to have suffered a major military defeat at the hands of the West Saxons at Pinhoe near Exeter in 658.
He is said to have been of a "peaceful and pious" temperament and to have patronised many churches.Then the hills of Armorica [Brittany] will crumble and he will be crowned with the diadem of Brutus.Wales will be filled with joy and the oaks of Cornwall will flourish.The church of Llangadwaldr in Anglesey identifies him as its founder.give Cadwaladr as the son of Cadwallon and the father of Idwal Iwrch.Idwal, who fathered the later king Rhodri Molwynog, may have been his successor.