Gwynno

Saint Gwynno (Gwynnog ab Gildas) is a Welsh saint of the 6th century, venerated in Glamorgan in south Wales. The Vatican archives record that his festival is 26 October and that he is regarded as a confessor; near Llanwynno there is a sacred well, Ffynnon Wyno, associated with his name.

He appears to have been the son of Cau (Euryn y Coed aur). In the year of the Yellow Plague, 547, after the death of Saint Illtyd, his monks fled from west Wales to Brittany; instead of returning to Pembrokeshire, they went east and settled in Glamorgan at Llantwit Major (Llanilltud Fawr). Gwynno is counted among the disciples and associates of Illtyd who accompanied them, some of them Bretons. Saint Dyfrig had founded three centers of learning in south-⁠east Wales (at Llancarfan, Caerworgorn and Caerleon), and Gwynno was, it seems, one of the early monks of the community at Llancarfan.

Under the name of Gwynno he is considered one of the three founders of Llantrisant in Glamorgan, together with Illtyd and Dyfodwg; the chapel at Llanwynno is dedicated to him. He is thought to have lived nearby, at the farmhouse of Daearwynno, "Gwynno's land". He is commemorated on 26 October, by the Western calendar (new style).