Gwyn ap Nudd  Gwyn ap Nudd (, sometimes found with the antiquated spelling Gwynn ap Nudd) is a Welsh mythological figure, the king of the "Tylwyth Teg" or "fair folk" and ruler of the Welsh Otherworld, Annwn, and whose name means “Gwyn, son of Nudd”. Described later on as a great warrior with a "blackened face", Gwyn is intimately associated with the otherworld in medieval Welsh literature, and is associated with the international tradition of the Wild Hunt. Gwyn is the son of Nudd (probably the same character elsewhere known as Lludd) and would thus be grandson to Beli Mawr and nephew of Arianrhod, Llefelys, Penarddun, Afallach, Gofannon, Nynniaw, Peibaw, and Caswallawn. Based on their shared patronymic ("ap Nudd"), his siblings include Edern, a warrior who appears in a number of Arthurian texts, and Owain ap Nudd, who is mentioned briefly in Geraint and Enid. In "Culhwch and Olwen", Gwyn is the lover of Creiddylad, the daughter of Lludd, who may therefore be Gwyn's own sister, though that connection was not made by the medieval author(s) of "Culhwch and Olwen". Gwyn plays a prominent role in the early Arthurian tale "Culhwch and Olwen" in which he abducts his sister Creiddylad from her betrothed, Gwythyr ap Greidawl. In retaliation, Gwythyr raised a great host against Gwyn, leading to a vicious battle between the two. Gwyn was victorious and, following the conflict, captured a number of Gwythyr's noblemen including Nwython and his son Cyledr. Gwyn would later murder Nwython, and force Cyledr to eat his father's heart. As a result of his torture at Gwyn's hands, Cyledr went mad, earning the epithet "Wyllt". After the intervention of Arthur, Gwyn and Gwythr agreed to fight for Creiddylad every May Day until Judgement Day. The warrior who was victorious on this final day would at last take the maiden. This fight may be an example of a putative contest between summer and winter as well as a variant of the putative Holly King myth proposed by Robert Graves.