Aristar'chus. (the best ruler). A Thessalonian, Acts 20:4; Acts 27:2, who accompanied St. Paul on his third missionary journey. Acts 19:29 He was with the apostle on his return to Asia, Acts 20:4, and again, Acts 27:2, on his voyage to Rome. We trace him afterwards as St. Paul's fellow prisoner in Colossians 4:10 and Philemon 1:24. Tradition makes him bishop of Apamea.