[1] However, it has been suggested that this pedigree may have been a late invention, and that his name points to an Anglo-Saxon origin.
[1] The cantref formed the eastern part of Perfeddwlad (or Y Berfeddwlad) on the northern coast of Wales between the River Clwyd and Deeside.
The territory, originally forming part of the Kingdom of Gwynedd, had been under the control of the Anglo-Saxons for several centuries and then changed hands several times between the two.
Edwin married Gwerydd, sister of Bleddyn ap Cynfyn, Prince of Gwynedd and Powys.
[1])[5] Edwin would come to be regarded as founder of one of the Fifteen Tribes of Wales, and as such antiquarians in later centuries would invent attributed arms for him.