Gabran's father was Domongart and his mother was Feldelm Foltchain. His paternal grandfather was Fergus; his maternal grandfather was Brion. He was an only child.
General Notes
He and his son are both called, in Welsh sources, "the Treacherous". Welsh pedigrees make him a son of Dyfnwal hen, allegedly of the line of Ceretic Guletic, regarded by later Welsh writers as an important ruler in northern Britain.