The surname Ewing is of Scottish origin, and is an Anglicised form derived from the Gaelic clan name "Clann Eóghain" meaning "Children of Eóghain". The forename "Eógan" is thought to derive ultimately from the Greek eugenes (Greek- ευγενής, meaning "noble", literally "well-born").
Ewyn is of English origin. Ewyn is a variation of Ewan (English and Scottish). Ewyn is also a variation of Ewing (English). Ewyn is seldom used as a baby name for boys.