Luke was a physician and possibly a Gentile. He was not one of the original 12 Apostles but may have been one of the 70 disciples appointed by Jesus (Luke 10).

Which Gospel was written by a gentile?

In contrast to either Mark or Matthew, Luke's gospel is clearly written more for a gentile audience. Luke is traditionally thought of as one of Paul's traveling companions and it's certainly the case that the author of Luke was from those Greek cities in which Paul had worked.

What nationality was Luke in the Bible?

Many scholars believe that Luke was a Greek physician who lived in the Greek city of Antioch in Ancient Syria, although some other scholars and theologians think Luke was a Hellenic Jew.