Eurneid, Euronwy uerch Glytno Eidin
Daughter of Clydno Eiddin, a ruler in the north in the late sixth century. His son, Cynon, were a leader at the Battle of Catraeth.
Culhwch says she is one of the “gold-torqued women” in Britain.
She is the character Euronwy uerch Glytno Eidin in the Bonedd Y Saint.
Source
Culhwch and Olwen | Late 11th century