10 My fellow prisoner Aristarchus sends you his greetings, as does Mark, the cousin of Barnabas. (You have received instructions about him; if he comes to you, welcome him.) 11Jesus, who is called Justus, also sends greetings. These are the only Jews among my co-workers for the kingdom of God, and they have proved a comfort to me.
With Paul at the time, Aristarchus, Mark, Justus were the only Jews among his co-workers.
12 Epaphras, who is one of you and a servant of Christ Jesus, sends greetings.
With Paul at the time, Epaphras was a gentile from Colossae.
He is always wrestling in prayer for you, that you may stand firm in all the will of God, mature and fully assured. 13 I vouch for him that he is working hard for you and for those at Laodicea and Hierapolis. 14 Our dear friend Luke, the doctor, and Demas send greetings.
Besides Epaphras the gentile, Luke and Demas, were with Paul.
How likely is it that Luke was a gentile?