Ailerán( - 29 December, 664 )
Ailerán, also known as Ailerán sapientis was an Irish scholar and saint who died 29 December, 664 or 665. His feast day is December 29.
Ailerán was one of the most distinguished scholars at the School of Clonard in the 7th century.
His early life is not recorded, but he was attracted to Clonard by the fame of Saint Finnián and his disciples. He became lector of the school in 650. He died of the Yellow Plague, and his death is recorded in the Annals of Ulster. Because of his knowledge of the works of Origen, Philo, St. Jerome, St. Augustine, and others, he was well versed in patristic literature.
According to John Colgan, numerous works can be ascribed to Ailerán, including the Fourth Life of Saint Patrick, a Latin litany, and the Lives of Saint Brigid and Saint ">Féichín of Fore....