Tertius
The third, a Roman Christian whom Paul employed as his amanuensis in writing his epistle to the Romans (16:22).
M. G. Easton, Illustrated Bible Dictionary, 3rd edition (1897). Public domain; text from the Christian Classics Ethereal Library. A nineteenth-century Protestant reference: its dates, archaeology and judgements reflect the scholarship of its time and are not Imago Dei's editorial position.