the inspired authors of the Gospels. The word is derived from the Greek, ευαγτελιον , formed of ευ , bene, "well," and αγτελος , angel, messenger. The name of evangelists is said by some to have been given in the ancient church to such as preached the Gospel without being attached to any particular church, being either commissioned by the Apostles to instruct the nations, or, of their own accord, abandoning every worldly attachment, consecrated themselves to the sacred office of preaching the Gospel. In which sense these interpreters think it is that St. Philip, who was one of the seven deacons, is called "the evangelist" in Acts 21:8; and that St. Paul, writing to Timothy, bids him do the work of an evangelist, 2 Timothy 4:5 . It is, however, to be remarked, that the office in which the evangelists chiefly present themselves to our notice in the New Testament, is that of assistants to the Apostles; or, as they might be termed, vice apostles, who acted under their authority and direction. As they were directed to ordain pastors or bishops in the churches, but had no authority given them to ordain successors to themselves in their particular office as evangelists, whatever it might be, they must be considered as but temporary officers in the church, like the Apostles and prophets. The term evangelist is, at present, confined to the writers of the four Gospels.

Bibliography Information
Watson, Richard. Entry for 'Evangelists'. Richard Watson's Biblical & Theological Dictionary. https://www.studylight.org/dictionaries/eng/wtd/e/evangelists.html. 1831-2.

Bible Dictionaries Evangelists

Watson's Biblical & Theological Dictionary

Bible Dictionaries
Evangelists