Demas in Smiths Bible Dictionary

(governor of the people), most probably a contraction from Demetrius or perhaps from Demarchus, a companion of St. Paul, Phm 1:24; Col 4:14 during his first imprisonment at Rome. (A.D. 57.) At a later period, 2Ti 4:10 we find him mentioned as having deserted the apostle through love of this present world, and gone to Thessalonica.

Read More about Demas in Smiths Bible Dictionary