A bishop and noted theologian who was born in Thessaloncia. He became the bishop of Como, Italy, and attended the Council of Constantinople in 450. As a result of his obvious intellect and holiness, he was sent by Pope St. Leo I the Great to the Emperor Theodosius II as an envoy of the Holy See.
His mission led to the Council of Chalcedon in 451 and to the Council of Milan in 452. Abundius served as the pope’s representative in such councils, clearly stating the Church’s role and concerns.
Legend has him an Irishman noted for his military feats who was convinced by his sister St. Fanchea to renounce his warring activities and marry. When he found his fiancee dead, he decided to become a monk and went on pilgrimage to Rome, where he was ordained.
He returned to Ireland, built churches at Drogheda, and then secured from his brother-in-law King Oengus of Munster the island of Aran, where he built the monastery of Killeaney, from which ten other foundations on the island developed.
With St. Finnian of Clonard, Enda is considered the founder on monasticism in Ireland. His feast day is March 21