include: Arianrhod. Usually said to be a daughter of Dôn, Triad 35 gives Beli as her father. Though no other source connects Arianrhod or her family to that of Beli, Rachel Bromwich notes the triad does not necessarily contradict the Mabinogion tradition. Caswallawn fab Beli. In the Second Branch of the Mabinogi, he seizes the throne from Caradog ap Bran during Bran's campaigns in Ireland. He appears briefly in the third branch when Manawydan, the rightful claimant, pays homage to him. A large tradition seems to have once surrounded Caswallawn, involving his wars against Julius Caesar and Rome, his love for the maiden Fflur and his eventual departure from Britain with 21,000 men, never to be seen again. Caswallawn is derived from the historical British king Cassivellaunus, who led an alliance of tribes against Caesar in the mid first century. Lludd Llaw Eraint and Llefelys, Kings of Britain and Gaul, respectively. In accounts derived from Geoffrey of Monmouth and the tale of Lludd and Llefelys, Lludd becomes King of Britain following Caswallawn, and is responsible for rebuilding London and ridding the kingdom of three plagues that afflict the land with the help of his brother. He was probably the influence for Lud son of Heli, a British king who appears in the writings of Geoffrey of Monmouth. He is also known under the name Nudd Llaw Ereint and is a reflex of the Celtic god Nodens. As Nudd, he is the father of several notable figures in Welsh mythology including: Gwyn ap Nudd: The ruler of Annwfn, the Welsh otherworld and later Christianised into the king of the fairies, the tylwyth teg. He leads the hounds of hell, the Cŵn Annwn on the Wild Hunt, and is intimately associated with Glastonbury Tor. He appears as a member of Arthur's court in Culhwch and Olwen, in which he wages war against Gwythyr ap Greidawl for the hand of his sister Creiddylad, takes part in the hunt for Twrch Trwyth and accompanies Arthur to retrieve the blood of Orddu, the witch of the uplands of hell. He appears several times in the poetry of Dafydd ap Gwilym and is also mentioned in the Black Book of Carmarthen. Edern ap Nudd: A member of Arthur's retinue. He is defeated by Geraint in Geraint ac Enid and command a Danish army in the Battle of Badon against the Saxons in The Dream of Rhonabwy