Note 1 at Acts 19:22: The name Erastus means "beloved." Erastus was a believer who ministered to Paul. In this instance, Paul sent Erastus with Timotheus to Macedonia (see note 1 at Acts 16:9, p. 667). Erastus is spoken of by Paul in Rom. 16:23 as being the chamberlain of Corinth (see note 1 at Acts 18:1, p. ???), so it is probable that they were sent to the city of Corinth in Macedonia.

The word chamberlain that is used of Erastus in Rom. 16:23, originally identified one who kept the bedchamber of a king. However, it came to mean any officer with various duties. The Revised Version uses the word "treasurer" for chamberlain and most scholars agree with this. At any rate, this shows that Erastus was an influential man in Corinth. Paul also mentioned Erastus in his second letter to Timothy (2 Tim. 4:20).