Cynwyl
From BiblePortal Wikipedia
Cynwyl [1]
a Welsh saint of the 6th century, was one of the sons of Dunod, Dinothus, or Dinott, and co-founder with him of the monastery of Bangor Iscoed. He is himself deemed the founder of Cynwyl Gaio, the church of a parish adjoining that of Llanddewi Brefi; of Cynwyl, Elfed, in Carmarthenshire; and of Aberporth, in Cardiganshire. He is commemorated on April 30 (Rees, Welsh Saints, pages 206, 260).