Llewei, daughter of Seitwed; Rore (Rorei), daughter of Usber; and Mederi Badellfawr (‘Big Knee’?).
Sources
Red Book of Hergest | C. 1425
Text of the Mabinogion and Other Welsh Tales | John Rhys, 1887
Nightbringer | The Arthurian Online Encyclopedia
Llewei, daughter of Seitwed; Rore (Rorei), daughter of Usber; and Mederi Badellfawr (‘Big Knee’?).
Sources
Red Book of Hergest | C. 1425
Text of the Mabinogion and Other Welsh Tales | John Rhys, 1887