Nightbringer | The Arthurian Online Encyclopedia

Efrddf

Efrddyl, Erfddf

The twin sister of King Urien of Rheged, daughter of Cynfarch and Brychan, and aunt of Owain, according to the Welsh Trioedd Ynys Prydein.


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