LLANGYNOG (LLAN-GYNOG), a parish, in the union and hundred of BUILTH, county of BRECKNOCK, SOUTH WALES, alt miles (S. W.) from Builth; containing 54 inhabitants. his place, which derives its name from the dedication of its church to St. Cynog, an eminent British saint, who suffered martyrdom about the close of the fifth century, is situated in the northern portion of the county, on the turnpike-road leading from Brecknock to Builth; and is bounded on the north by the parish of Llanddewi'r-Cwm, on the south by that of Gwenddwr, on the east by the county of Radnor, and on the west by the lofty range of the Eppynt hills. It comprises about 2000 acres, 1000 of which are comprehended in a dreary and mountainous tract extending. beyond the confines of the parish, and the remainder consists of about one-sixth arable, the same of woodland, and two-thirds of meadow and pasture: the soil is poor, producing only a little oats and barley, the farmers depending chiefly on the rearing of sheep and a few hardy cattle, for which the hilly grounds afford but inferior pasture. The Eppynt hills are partly within the parish; and from their summits some extensive views are obtained over the adjacent country: the immediate neighbourhood, through which runs the small river Dihonwy, exhibits only wild and mountainous scenery. Of the rateable annual value, the return amounts only to £320. The living is a perpetual curacy, endowed with £800 royal bounty; net income, £69; patron and appropriator, Prebendary of Llandarog, in the Collegiate Church of Brecknock. The church, a small, ancient, and mean edifice, possessing no claim to architectural notice, stands a little eastward from the mountain road between Brecknock and Builth, on the brow of the Eppynt hills, in a very bleak situation, sheltered only by some larch and fir trees, by which the churchyard is surrounded.