The other people named Gaius

The name Gaius occurs four other times in the New Testament, other than in his epistle.  First, a Christian Gaius is mentioned in Macedonia as a traveling companion of Paul, along with Aristarchus.  One chapter later, a Gaius from Derbe is named as one of Paul’s seven traveling companions who waited for him at Troas.  Next, a Gaius is mentioned residing in Corinth as being one of only a few people there who was baptized by Paul.  Lastly, a Gaius is referred to in a final greeting portion of the Epistle to the Romans, as Paul’s host in Corinth.  However, there is no strict reason to suppose that any of these men were the same Gaius of 3 John.  Nevertheless, it is still a possibility.  How many people do you know named Gaius?