Natalis of Ulster, also known as Saint Naile, was a 6th-century Irish monk who lived during the early Christian period in Ireland. As a student of Columba, he established several monastic foundations across Ulster, including sites at Inver, Kinawley, and Devenish Island. He served as an abbot at multiple locations, notably succeeding Saint Molaise at Devenish Island. He was the son of Aenghus, a descendant of Lughaidh, the King of Munster, and he passed away in 564.