[W, silver disk, wheel].
A renowned beauty of Welsh literature whose story may be based on that of an earlier moon goddess. Assumed to be the daughter of Dôn, she was the sister and lover of Gwydion; in the Triads her father is given as Beli. She claimed to be a virgin so that she might become the footholder of Math. When the asserted virginity was tested, she gave premature birth to twins, Dylan, who escaped into the sea, and Lleu Llaw Gyffes, who became the object of his mother's scorn. Gwydion rescued the child and reared him carefully. According to folk tradition, there is a reef off the coast of Gwynedd (formerly Carnarvonshire) called Caer Arianrhod that is the remains of an island castle where Arianrhod was tricked into giving Lleu the arms she intended to withhold. Caer Arianrhod is also a popular Welsh name for the constellation Corona Borealis. Arianrhod had other brothers, Gilfaethwy and Caswallon, with whom she did not have intimacies. R. S. Loomis suggested that Arianrhod may be a counterpart of the Arthurian figures Lunete and Morgawse.