Marcus, Aristarchus, Demas, Lucas,.... Marcus was Barnabas's sister's son, the son of that Mary, in whose house the church met, and prayed for Peter when in prison; whose name was John Mark, whom Saul and Barnabas took along with them to Antioch, and from thence, in their travels, to other parts; but he leaving them at Pamphylia, was the occasion of a contention between Saul and Barnabas afterwards, when returned to Antioch; the latter insisting on his going with them again, and the former refusing it on account of his departure from them; which contention rose so high that they parted upon it, Ac 12:12 though after this the apostle was reconciled to him; he approving himself to be a faithful and useful minister of the Gospel; and therefore he desires Timothy to bring him along with him, 2Ti 4:11 and if this epistle was written after that, he was now come to him; however, he was now with him, whether before or after: Aristarchus was a Macedonian of Thessalonica; or very likely the apostle had been the instrument of converting him there, and who followed him from thence, and attended him wherever he went; he was with him in the uproar raised by Demetrius at Ephesus, and accompanied him into Asia; went with him in his voyage to Rome, and was now a fellow prisoner there, Ac 19:29.
Demas is the same with him who is mentioned in 2Ti 4:10 and if this epistle is later than that, it should seem that he was restored from his fall, and was returned to the apostle.