High Quality Content by WIKIPEDIA articles! Llanrhychwyn is a hamlet in Conwy county borough, Wales. It lies in the Conwy valley in North Wales, less than a mile south of Trefriw, and a mile north-west of Llanrwst. Today neighbouring Trefriw is a large village with a population of over 1,300, but in the time of Llywelyn Fawr (Llywelyn the Great), and up to the early 19th century, Llanrhychwyn was larger than Trefriw, which consisted simply of "a few houses here and there" (quote from Hanes Trefriw, by Morris Jones). Indeed, even today both Trefriw and Llanrhychwyn lie within the parish of Llanrhychwyn.