Saint Afan of Wales (specifically of Builth) was the son of Cedig ap Ceredig, son of Cunedda Wledig, king of Gwynedd. He was born in Wales in the 5th century and a cousin of Saint David, the patron Saint of Wales. His mother was Dwywai, one of the daughters of Tegid the Bald a lord of Penilyn.
He is recorded as a Bishop, likely as the third bishop of Llanbadam in Ceredigion or the bishop of Builth. He is famous for a miracle that occurred after his death when the Anglo-Norman lord Philip de Braose used Saint Afan's church disrepsectfully as a hostel one night. He was struck blind and told in a vision that his vision would return only if he sold all of his possessions and fought in the Crusades. The legend holds that he did indeed travel to the Holy Land and fought blind, dying in an honorable death.
Saint Afan was recorded as being martyred by Irish pirates on the banks of the River Chwefru in the 6th century. He was canonized pre-congregation with his original feast recorded as November 16th.