Saint Cewydd was a pre-congregational saint of Wales in the Early Middle Ages (6th century). He is known as the Welsh 'Rain Saint', like Medard in France, Gildas in Brittany and Swithin in England. It would appear that a pre-Christian rain day might have been associated with a date in July, when, if it rained on that day, it was believed rain would continue for forty days.
Very little is known of his life due to the scarcity of records in the early Dark Ages in Wales. He is known mainly from churches associated with him, which are on Anglesey (Wales), Lancaut in Chepstow (Wales/England border), Cusop (Wales/England border), Kewstoke (Somerset, England), Steynton in Rhos (Pembrokeshire, Wales), Aberedw (Radnorshire, Wales], Disserth yn Elfael (Radnorshire, Wales), Llangewydd and Laleston (Bridgend, Wales), Capel Cewy, Mynachlogddu (Pembrokeshire, Wales).
Ecclesiastical records in the Book of Llandaff refer to a religious establishment of lann ceuid, probably at Lancaut, which is likely to have been established by 625AD and was recorded there by 703AD.
- Charles Knight, The English Cyclopaedia: Division. Geography. 4v.(Bradbury, Evans, 1867) page 132.
- Church of St Cewydd, Aberedw (British Listed Buildings).
- John Davies (historian) & Nigel Jenkins Menna, Baines et al., eds. (The Welsh Academy Encyclopaedia of Wales. Cardiff: University of Wales Press, 2008) p.444.
- Forest of Dean Local History
- Gloucestershire Wildlife Trust, Lancaut and Ban-y-Gor Nature Reserves, local leaflet.
- T. B&G AS Walters, A Survey of St James’s Church (1992), 125-126
- Charles Parry, A Survey of St James’s Church Transactions of the Bristol and Gloucestershire Archaeological Society 1990 volume108 Archived 3 March 2016 at the Wayback Machine pages 53–103.