Hi CoreIssue,
I imagine you are talking about Luke here. I don't think the Bible says for certain, but there is this:
Colossian 4:10-14
10 Aristarchus my fellowprisoner saluteth you, and Marcus, sister's son to Barnabas, (touching whom ye received commandments: if he come unto you, receive him
11 And Jesus, which is called Justus, who are of the circumcision. These only are my fellowworkers unto the kingdom of God, which have been a comfort unto me.
12 Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.
13 For I bear him record, that he hath a great zeal for you, and them that are in Laodicea, and them in Hierapolis.
14 Luke, the beloved physician, and Demas, greet you.
Aristarchus, Marcus, Barnabas, Jesus, called Justus, are all named "of the circumcision". Epaphras, Luke, and Demas are named separately.
Why the segregation in names? Why call these "of the curcumcision", and not the others? To me this indicates that Epaphras, Luke, and Demas are not. But I wouldn't be dogmatic about it.
And we don't know the authorship of Job either. Of do we? Do we know?
Much love!
Just their pattern of speech.
Plus Luke traveled with Paul.
The book of Job no we don't. It is believed he predated Israel. As did Noah and all before him.