Romans 16:23
Gaius my host, and of the whole church, salutes you. Erastus the chamberlain of the city salutes you, and Quartus a brother.
Nave's Topical Index

Acts XXVIII
... had run away from his master, a convert of Paul's ... to the expectation once entertained
by Paul, that he ... left Trophimus sick; and Corinth, where he left Erastus. ...
/.../mcgarvey/a commentary on acts of the apostles/acts xxviii.htm

Erastus

Erastus: A Friend of Paul

Erastus: Convert of Paul's, Probably Same As Preceding

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