Gyffylliog, a parish in Denbighshire consisting of four townships; Ffrithoedd, Trefor, Treganol, and Treparc. The village is situated on the river Clywedog in a picturesque valley, a branch of the Vale of Clwyd, 4 1/2 miles from Enthin. It has a post office under Ruthin (R.S.O.); money order and telegraph office, Ruthin. Acreage, 8181; -population of the civil parish, 427; of the ecclesiastical, 477. The living is a rectory in the diocese of St Asaph; tithe commuted at £347; net value, £250 with residence. Patron, the Bishop of St Asaph.