The Apostle Paul
2 Corinthians 8:18BSB·traditional attribution

Along with Titus we are sending the brother who is praised by all the churches for his work in the gospel.

John Calvin Reformed @genevareformer

18. We have sent with him the brother. The circumstance that three persons are sent, is an evidence, that great expectations were entertained respecting the Corinthians, and it became them to be so much the more attentive to duty, that they might not disappoint the hopes of the Churches.

Matthew Henry Presbyterian @wholebiblehenry

In these verses the apostle commends the brethren who were sent to them to collect their charity; and as it were, gives them letters credential, that, if they were enquired after (Co2 8:23), if any should be inquisitive or suspicious concerning them, it might be known who they were and how safely they might be trusted. I. He commends Titus, 1.

Commenting on 2 Corinthians 8:16-24

John Gill Reformed Baptist @doctorgill

And not that only, but who was also chosen of the churches,.... Not only famous for preaching the Gospel, but he was also appointed by the joint suffrages of the churches, which were made by the lifting up or stretching out of the hand, as the word here used signifies; this brother was not chosen to this service by a few private persons, or by...