Dogfan, also known as Doewan, was a 5th-century Welsh monk and martyr. As a son of King Brychan, he belonged to a royal lineage in Wales. He is recognized as the patron saint of Llanrhaeadr-ym-Mochnant, a location that may have served as the birthplace of his mother. His life and death are preserved within various Christian traditions, marking him as a significant figure in early Welsh religious history.