Defynnog is a small village in the community of Maescar in the county of Powys, Wales. It lies immediately south of Sennybridge and a few miles west of Brecon within the Brecon Beacons National Park. Defynnog lost much of its importance with the development of Sennybridge.
The village (which has also been referred to historically as 'Devynnock') sits beside the Afon Senni just south of its confluence with the River Usk and where the A4215 road meets the A4065. The Welsh name signifies the 'territory belonging to Dyfwn'. Its church is dedicated to Saint Cynog.[1] [2]
The local church, Saint Cynog, contains an ancient stone with Ogham inscriptions. The old vicarage, at the northern edge of the churchyard contains the name of Moses Williams FRS on one of the beams of its attics.
The property immediately south of the lynchgate (Ty Defynnog, formerly Defynnog House) is almost certainly made up of two former cottages. Its cellar contains a stone slab of uncertain purpose.
The Sir John Davy School, now a cafe and antiques centre, ceased to be a centre of education when the local primary school was transferred to Sennybridge. It continued to be called Defynnog School until the mid 1980s when it was renamed Sennybridge School.
The Sir John Davy Alms houses are sited close to a former police station and court, later a brass rubbing centre and now a bed and breakfast, complete with police cells. Dewi Davies' book (p. 151) contains an account of sheep stealing in Defynnog.
"Law and Disorder in Breconshire", Dewi Davies, published by D.G and A.S. Evans, Brecon.
images of Defynnog and surrounding area on Geograph website
http://www.coflein.gov.uk/en/site/23193/details/SIR+JOHN+DAVY'S+SCHOOL%3B+ALMSHOUSES,+DEFYNNOG/