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Feastday: December 29

Death: 664

Monk, biographer, and scholar-also called Sapiens the Wise. Aileran was one of the most distinguished professors at the school of Clonard in Ireland. St. Finian welcomed Aileran to Clonard. In 650, Aileran became rector of Clonard, and was recognized as a classical scholar and a master of Latin and Greek. He wrote The Fourth Life of St. Patrick, a Latin-Irish Litany and The Lives of St. Brigid and St. Fechin of Fore. His last work was a treatise on the genealogy of Christ according to St. Matthew. A fragment of another of Aileran's works has survived: A Short Moral Explanation of the Sacred Names. Scholarly institutions across Europe read this work aloud annually. Aileran died from the Yellow Plague. His death on December 29, 664 is chronicled in the Annals of Ulster.

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