What does the last name Ewing mean?

Ewing comes from the Greek eugenes (Greek- ευγενής, meaning "noble", literally "well-born") via the Gaelic Eoghan, leading to Ewen, which has the same roots as Owen, according the Oxford Dictionary of English Surnames. Ewing is one of the more common of the many variations that appears throughout Celtic Britain and also in Brittany (as Evin), including the latinised Eugenius, as well as Eugene and MacEwen/MacEwan