Saint Edern was a ninth-century monk originally from Ireland who later became a prominent figure in Brittany. After spending time in Welsh hermitages, he moved to the Breton region to evangelize local areas like Plouédern. Accompanied by his sister, Jenovefa, he established a residence in a high summit area, which eventually gave its name to the locality of Edern. He is remembered as a holy man whose life and miracles left a lasting mark on the Finistère region.