The legend goes that the pious Dwynwen was romanced by a Prince called Maelon Dafodrill, who had fallen in love with her. Longing for a life dedicated to God, and not wanting to marry him, an angel appeared as she prayed for help and offered her a potion to give him, which immediately turned him to ice. Dwynwyn then asked God for three wishes, the first that Maelon be released from his ice curse; second, that God look after all lovers, through her; and finally, that she never marry. She then retreated to an island off the west coast of Anglesey called Ynys Llanddwyn, and became a hermit until her death in 465 AD.
The island soon became a place of Medieval pilgrimage and the cult of St Dwynwen began.