Boyd’s Bible Dictionary:
(best ruler). A Thessalonian companion of Paul on his third missionary tour (Acts 19:29; 20:4; 27:2; Col. 4:10; Philem. 24).
Concise Bible Dictionary:
A Macedonian of Thessalonica, companion of Paul on several journeys and on his way to Rome. Paul once calls him “my fellowprisoner” (Acts 19:29; Acts 20:4; Acts 27:2; Col. 4:10; Philem. 1:24).
Strong’s Dictionary of Greek Words:
Transliteration:
Aristarchos
Meaning:
from the same as 712 and 757; best ruling; Aristarchus, a Macedonian
Jackson’s Dictionary of Scripture Proper Names:
best ruler
Potts’ Bible Proper Names:
Ruling best; excellent ruler:―a Thessalonian, Acts 19:29. {Optime imperans}