LLANYSTYMDWY, a village and a parish in Pwllheli district, Carnarvon. The village stands on the river Dwy, near the coast, 2 miles WN W of Criccieth r. station, and 8 ENE of Pwllheli; and has a post office under Pwllheli. The parish comprises 6,522 acres of land, and 258 of water. Real property, £4,956. Pop., 1,126Houses, 236. The property is divided among a few. Plas Hen belonged, in the time of King John, to Howelly-Vwyall; and belongs now to the Mostyns. Gwynvryn is the seat of Major Nanney; Trefan is the seat of S. O. Priestley, Esq.; and Plashen belongs to J. E. Nanney, Esq. The living is a rectory in the diocese of Bangor. Value, £485.* Patron, the Bishop of Bangor. The church was rebuilt in 1863. There are chapels for Independents and Calvinistic Methodists, and an endowed school with £31 a year.

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