He may or may not be Maponos. He may have been imprisoned when only 3 days old, and it may have been in Gloucester. He may have had a pet hound called Culhwch, and he may have taken a razor from between the ears of a wild boar, although what a razor was doing there in the first place is not al all clear. Is there a breed of pig called Razor Back?
Finally, he may have been something to do with King Arthur. In which case we wash our hands of the whole business.