(Éon d'Étoile; died after 1148), possibly of noble birth, was a charismatic hermit and itinerant preacher of little education. After several years of preaching in Brittany and Gascony, where he attracted many followers, he was arraigned before the Council of Reims in 1148 and condemned to seclusion in the monastery of St. Denis in Paris. It is unclear what led him to assert that he was God's son, the future judge of the living and dead.
Bibliography
J.C. Cassard, “Eon d'Étoile, ermite et hérésiarque breton,” MSHAB 57, 1980, 171–198.