LLANDECWYN, a village and a parish in Festiniog district, Merioneth. The village stands high on a mountain side, about midway between the lakes Llyn-TecwynIsaf and Llyn-Tecwyn-Uwchaf, above the river TraethBach, near the Barmouth and Carnarvon railway, 4½ miles NNE of Harlech r. station.—The parish goes down to the river, and includes much mountain and many lakes. Post town, Tan-y-Bwllclh, under Carnarvon. Acres, 6,915; of which 180 are water. Real property, £1,586; of which £20 are in mines. Pop., 436. Houses, 91. The property is divided among a few. Maes-y-Neuadd is a chief residence. Stone is quarried, and lead ore is worked. The lakes abound with fish, but have been much poached by the quarrymen. The scenery around the lakes is interesting. The living is a p. curacy, annexed to the p. curacy of Llanfihangel-y-Traetlhau, in the diocese of Bangor. The church is early English, in tolerable condition; and is dedicated to St. Tecwyn. Charities, £5.

(John Marius Wilson, Imperial Gazetteer of England and Wales (1870-72))