Romans 16:23
Gaius mine host and the host of all the congregations, saluteth you. Erastus, the chamberlain of the city, saluteth you. And Quartus, a brother, saluteth you.
Acts 19:22
So sent he into Macedonia two of them that ministered unto him: Timothy and Erastus: but he himself remained in Asia for a season.
1 Corinthians 1:14
I thank God that I baptised none of you, but Crispus and Gaius,
2 Timothy 4:20
Erastus abode at Corinth. Trophimus I left at Miletus sick.
3 John 1:1-6
The elder unto the beloved Gaius, whom I love in the truth.
Acts 19:29
And all the city was on a roar, and they rushed into the common hall with one assent, and caught Gaius, and Aristarchus, men of Macedonia, Paul's companions.
Acts 20:4
There accompanied him into Asia, Sopater of Beroea: And of Thessalonica, Aristarchus and Secundus, and Gaius of Derbe, and Timothy: And out of Asia, Tychicus and Trophimus.