Romans 16:23
Gaius my host, and of the whole church, greets you. Erastus the treasurer of the city greets you, and Quartus a brother.
Acts 19:22
So he sent into Macedonia two of them that ministered unto him, Timothy and Erastus; but he himself stayed in Asia for a time.
1 Corinthians 1:14
I thank God that I baptized none of you, but Crispus and Gaius;
2 Timothy 4:20
Erastus remained at Corinth: but Trophimus have I left at Miletus sick.
3 John 1:1-6
The elder unto the well beloved Gaius, whom I love in the truth.
Acts 19:29
And the whole city was filled with confusion: and having caught Gaius and Aristarchus, men of Macedonia, Paul's companions in travel, they rushed with one accord into the theater.
Acts 20:4
And there accompanied him into Asia Sopater of Berea; and of the Thessalonians, Aristarchus and Secundus; and Gaius of Derbe, and Timothy; and of Asia, Tychicus and Trophimus.