The third, a Roman Christian whom Paul employed as his amanuensis in writing his epistle to the Romans (16:22).
Tertius
1 verse
Romans
Romans 16:22
I Tertius, who wrote this epistle, salute you in the Lord.
From Easton's Bible Dictionary
Matthew George Easton, 1897
From Smith's Bible Dictionary
William Smith, 1884
(third), probably a Roman, was the amanuensis of Paul in writing the Epistle to the Romans. (Romans 16:22) (A.D. 55.)