2 Timothy 4:14

Alexander the coppersmith did me much evil: the Lord will render to him according to his works: of whom do thou also beware; for he greatly withstood our words.

Lockyer lists five characters bearing this name in the New Testament.[23] They are (1) the one here mentioned, (2) a prominent member of the high priestly family in Jerusalem (Acts 4:6), (3) the son of Simon who bore the cross of Jesus (Mark 15:21), (4) the man identified with the tumult at Ephesus (Acts 19:35), (5) a Christian who became an apostate (1 Timothy 1:20), possibly, though not certainly, the man in view here. The name was about as common in those days as Jones and Smith are today, and there can be no certainty with regard to identifying any of these Alexanders with any of the others listed.

The Lord will render to him according to his works ... One loses patience with commentators who tend to find Paul at fault in such a statement as this. Here was a man who was trying to hinder the gospel of Christ, doing a great deal of damage to the blessed apostle; and it was only natural that Paul should have been comforted in the assurance that God will judge and punish such evil-doers. He uttered no imprecations, expressed no bitterness and manifested no vindictiveness of any kind. The fact stated here should comfort all who truly love the Lord.

Do thou also beware ... If Alexander lived in Ephesus, where Timothy was located, or if he lived in Rome to which Paul summoned Timothy, Timothy would encounter him either way; hence the necessity of this warning.