Tudno was a 7th-century Welsh religious leader and abbot. According to tradition, he was a son of King Seithenyn, whose kingdom was lost to the sea. To seek a religious life, he settled on the Great Orme peninsula, where he initially lived as a hermit in a coastal cave. He is recognized as the founder of the original parish church in the area, which eventually led to the establishment of the town of Llandudno, a name derived from his own.