NIGHTBRINGER | The Arthurian Encyclopedia

Gwenllian Teg

‘Gwenllian the Fair’
Gwenlliant

Daughter of Garwy Hir. She was one of the three mistresses of King Arthur, according to the Triad.

Culhwch lists her as one of the Gold-torqued Women of Britain.

fair Gwenlliant the magnanimous maiden


Source
Triads of the Island of Britain (Welsh ”Triads”) | 11th century to 14th century