Cewydd

Saint Cewydd was a Welsh saint of the sixth century, honoured on the island of Anglesey in Wales and at Lancaut in Gloucestershire in England. Very little is known of his life, because of the scarcity of records of that age. He is known mainly from churches associated with him, on Anglesey, at Lancaut (near Chepstow), Cusop, Kewstoke (Somerset), Steynton, Aberedw, Disserth, Llangewydd and Laleston, and Capel Cewy. The Book of Llandaff refers to a religious establishment of lann ceuid, probably at Lancaut, likely established by 625 and recorded in 703.

In Wales he is called the "Rain Saint", like Medard in France, Gildas in Brittany and Swithin in England; it appears that a pre-⁠Christian rain day was associated with a date in July, when, if it rained on that day, rain was believed to continue for forty days. His feast is on 1 July, while the tradition of South Wales commemorates him on 15 July, as Dygwyl Cewydd. The Orthodox calendar lists him on 1 July, as a saint of the West before the Great Schism (a saint of the undivided Church), by the New Calendar.