Merfyn Frych ('Merfyn the Freckled'; , Mermin), also known as Merfyn ap Gwriad ('Merfyn son of Gwriad') and Merfyn Camwri ('Merfyn the Oppressor'), was King of Gwynedd from around 825 to 844, the first of its kings known not to have descended from the male line of Cunedda.