Welsh Meaning: The name Ewan is a Welsh baby name. In Welsh the meaning of the name Ewan is: God is good. Greek Meaning: The name Ewan is a Greek baby name. In Greek the meaning of the name Ewan is: Well-born.Famous bearer: Prince Eugene of Savoy; American playwright Eugene O'Neill. Irish Meaning: The name Ewan is an Irish baby name. In Irish the meaning of the name Ewan is: God's gift. From a Gaelic word for youth.n Welsh the meaning of the name Ewan is: God is good. Greek Meaning: The name Ewan is a Greek baby name. In Greek the meaning of the name Ewan is: Well-born.