Apollos

a Jew "born at Alexandria," a man well versed in the Scriptures
and eloquent (Acts 18:24; R.V., "learned"). He came to Ephesus
(about A.D. 49), where he spake "boldly" in the synagogue
(18:26), although he did not know as yet that Jesus of Nazareth
was the Messiah. Aquila and Priscilla instructed him more
perfectly in "the way of God", i.e., in the knowledge of Christ.
He then proceeded to Corinth, where he met Paul (Acts 18:27;
19:1). He was there very useful in watering the good seed Paul
had sown (1 Cor. 1:12), and in gaining many to Christ. His
disciples were much attached to him (1 Cor. 3:4-7, 22). He was
with Paul at Ephesus when he wrote the First Epistle to the
Corinthians; and Paul makes kindly reference to him in his
letter to Titus (3:13). Some have supposed, although without
sufficient ground, that he was the author of the Epistle to the
Hebrews.