Morfydd
Morfydd ferch Urien is a figure of Welsh Arthurian legend. She is the daughter of Urien Rheged by Modron, and twin sister to Owain. Morfydd appears in the Welsh Triads and is also referred to in Culhwch and Olwen. The enduring love between her and Cynon son of Clydno, one of Arthur's warriors, is remarked on in several of the Triads, pointing to a now lost popular tradition.
The circumstances of their birth is related in a Welsh folktale:
