The Apostle Paul
Romans 16:21BSB·traditional attribution

Timothy, my fellow worker, sends you greetings, as do Lucius, Jason, and Sosipater, my fellow countrymen.

John Calvin Reformed @genevareformer

21. Timothy, etc. The salutations which he records, served in part to foster union between those who were far asunder, and in part to make the Romans know that their brethren subscribed to the Epistle; not that Paul had need of the testimony of others, but because the consent of the godly is not of small importance. The Epistle closes, as we see, with praise and thanksgiving to God.

Matthew Henry Presbyterian @wholebiblehenry

As the Apostle had before sent his own salutations to many of this church, and that of the churches round him to them all, he here adds an affectionate remembrance of them from some particular persons who were now with him, the better to promote acquaintance and fellowship among distant saints, and that the subscribing of these worthy names, known to them, might the more recommend this epistle.

Commenting on Romans 16:21-24

John Gill Reformed Baptist @doctorgill

I Tertius, who wrote this epistle,.... This name is a Latin one, and perhaps the person might be a Roman, for the names Secundus, Tertius, Quartus, Quintus, &c. were common with the Romans; unless it may be thought, as it is by some, that this man was the same with Silas, who was a constant companion of the apostle; and the Hebrew word is the...