Tegau Eurfon

Tegau Gold-Breast

The wife of Caradoc Briefbras and a lady at Arthur’s court in Welsh tradition. She had three treasures: a mantle, a cup and a carving knife.

She possessed an enchanted mantle which, when worn by a woman, would tell if she was faithful or adulterous by appearing, respectively, a perfect fit or too short. Such mantles are used in chastity tests throughout Arthurian romance.

Chrétien de Troyes calls her Guignier in Perceval.

See also
Thirteen Treasures of Britain | The Legend of King Arthur

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