In 1870-72, John Marius Wilson's Imperial Gazetteer of England and Wales described Llanwnnen like this:
LLANWNEN, a parish in Lampeter district, Cardigan; near the influx of the river Granell to the Teifi, 3 miles W by S of Lampeter r. station. It has a postoffice under Carmarthen, and fairs on 24 March and 13 Dec. Acres, 2,480. Real property, £1,316. Pop., 344. Houses, 61. The property is divided among a few. Llwyn-y-Groes is a chief residence. Remains of an old fort are at Castell-Du. The living is a vicarage, united with the p. curacy of Silian, in the diocese of St. David's. Value, £102. Patron, the Bishop of St. David's. The church is dedicated to St. Gwynin, and is good.
A Vision of Britain through Time includes a large library of local statistics for administrative units. For the best overall sense of how the area containing Llanwnnen has changed, please see our redistricted information for the modern district of Ceredigion. More detailed statistical data are available under Units and statistics, which includes both administrative units covering Llanwnnen and units named after it.
GB Historical GIS / University of Portsmouth, History of Llanwnnen, in Ceredigion and Cardiganshire | Map and description, A Vision of Britain through Time.
Date accessed: 28th August 2015
Click here for more detailed advice on finding places within A Vision of Britain through Time, and maybe some references to other places called "Llanwnnen".