A companion and fellow-labourer of Paul during his first imprisonment at Rome (Philemon 1:24; Col. 4:14). It appears, however, that the love of the world afterwards mastered him, and he deserted the apostle (2 Tim. 4:10).
Col.4: Luke, the beloved physician, and Demas, greet you.
2Tim.4: For Demas hath forsaken me, having loved this present world, and is departed unto Thessalonica; Crescens to Galatia, Titus unto Dalmatia.