LLANWYDDELAN, a parish in Newtown district, Montgomery; on the river Rhiw, near the Caersws Roman way, 4 miles S by W of Llanfair, and 6½ N by W of Newtown r. station. It contains the townships of Pencoed, Penymes, and Treganol; and its Post town is Llanfair-Caereinion, under Welshpool. Acres, 3,784. Real property, £2,095. Pop., 476. Houses, 96. The property is subdivided. Much of the surface is hill pasture. An ancient British camp is at Pen-y-Gaer. The living is a rectory in the diocese of St. Asaph. Value, £250,* Patron, the Bishop of Llandaff. The church is dedicated to St. Gwyddelan, and is good. There is a Calvinistic Methodist chapel.

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