Gwenddydd
Gwenddydd, also known as Gwendydd and Ganieda, is a powerful sorceress from the Old North of Britain. She is the sister of Myrddin, better known as Merlin, and a prophet in her own right. She has been featured in Welsh legends since the early Middle Ages, and has also appeared in Arthurian fiction, poetry, and drama by writers such as Laurence Binyon, John Cowper Powys, John Arden, Margaretta D'Arcy, and Stephen R. Lawhead.