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

The word "chamberlain," used of Erastus in Ro 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 (2Ti 4:20).