Odhran Ua hEolais (died A.D. 994) was a medieval scribe and scholar at the abbey of Clonmacnoise. He must have been born, and lived his childhood, in the kingdom of Conmaicne Magh Réin, which corresponds to present day south county Leitrim. We do not know any significant details of his personal life, but Odhran moved to county Offaly in adult life, to become Lector and a famous scriba of Clonmacnoise. His death is recorded in the Annals of the Four Masters. A cross-stone of Odhran, with his name inscription legible in middle Irish, is preserved to this day.