Cadfan ap Iago

[1] The historical person is known only from his appearance in royal genealogies, from his grant to Saint Beuno for the monastery at Clynnog Fawr, and from his inscribed gravestone in St Cadwaladr's Church, Llangadwaladr.

The inscription refers to him as sapientisimus (English: most wise), and as this term is historically used for ecclesiastics, it suggests that at some point, Cadfan had resigned as king to live a consecrated life.

There are minor variations of these accounts, sometimes with the details rearranged, such as in Rice Rees' 1836, Essay on the Welsh Saints, where he says that Cadfan (rather than his son Cadwallon) was given the golden sceptre by Beuno.

Edwin would eventually ally himself with Rædwald of East Anglia in 616, defeating and killing Æthelfrith and becoming one of Northumbria's most successful kings.

Edwin's life in exile is unknown, and there is no historical basis for placing him at the court of King Cadfan.