Afon Pyrddin

The Afon Pyrddin is a river forming a short section of the boundary between the counties of Brecknockshire and Glamorgan in Wales, United Kingdom. It also forms a part of the boundary of the Brecon Beacons National Park, and the boundary of the unitary authorities of Powys and Neath Port Talbot. The river and its waterfalls are one of the key attractions of the Fforest Fawr Geopark designated in 2005.

The name could mean 'river by the striking fortress' or 'sweet-flowing river'.^[1]

The streams of Nant y Bryn, Nant y Fedwen and Nant Hir come together to form the Pyrddin which flows south-eastwards for 3 miles (5 km) to its confluence with the Nedd Fechan (sometimes also known historically in an Englished form "Neath Vaughan"; at one time this would have been a fair indication of the Welsh pronunciation in English spelling, but with changes in English pronunciation it has now diverged considerably)).^[2]

^ Llywelyn, Malcolm (2018). Place Names in the Brecon Beacons National Park (first ed.). Llanrwst: Gwasg Carreg Gwalch. p. 14. ISBN 978-1-84524-275-6.
^ Ordnance Survey Explorer map sheet OL12 'Brecon Beacons National Park: western area'

[1] Llywelyn, Malcolm (2018). Place Names in the Brecon Beacons National Park (first ed.). Llanrwst: Gwasg Carreg Gwalch. p. 14. ISBN 978-1-84524-275-6.

[2] Ordnance Survey Explorer map sheet OL12 'Brecon Beacons National Park: western area'

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