Nightbringer | The Arthurian Online Encyclopedia

Three Ardent Lovers of the Island of Britain

Caswallawn, son of Beli, for Flur, the daughter of Mugnach Gorr; Trystan, son of Talluch, for Yseult, wife of March Meirchawn, his uncle; and Kynon, son of Clydno Eiddin, for Morvyth, daughter of Urien.

Red Book of Hergest | C. 1425
Text of the Mabinogion and Other Welsh Tales | John Rhys, 1887