GARTHEWIN, a township, in that part of the parish of LLANVAIR-TALHAIRN which is in the hundred of ISDULAS, county of DENBIGH, NORTH WALES, 6 miles (S. by W.) from Abergele. The population is returned with the parish. It lies on the western bank of the small river Elwy, and contains an elegant mansion of its own name, the seat of R. W. Wynne, Esq., a younger branch of the Wynnes of Melai, which commands a beautiful view of the rich but narrow vale of Elwy, environed by well- wooded hills, stretching out before it: the park is nearly three miles in length, and abounds with full-grown oaks.