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. … Excellent content provided by https://www.catholic.org/.