Aerdeyrn
Medieval Welsh saint
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Saint Aerdeyrn (c. 6th century) was a semi-legendary pre-congregational saint of Wales. He was a descendant of Vortigern, making him related to the royal house of Powys. He was the brother of Saint Edeyrn and Elldeyrn[1] with whom he is oft associated. His name was derived from the Celtic word for Prince.[2] He built churches in Glamorgan[3] and he is the patron Saint of Llanelldeyrn, Wales.[4]