Identity and Apostolic Connection
Orthodox tradition numbers Terence among the Seventy Apostles and commonly identifies him with the Tertius named in the Epistle to the Romans (Romans 16:22), the scribe who set down the apostle Paul's letter and added his own greeting. Several sources, including OrthodoxWiki and Wikipedia, describe him as the amanuensis of that epistle and place him in the circle of Paul's co-workers.
The sources connect him with other Apostles of the Seventy associated with Iconium and the surrounding region, including Sosipater, Erastus, Olympas, Herodion, and Quartus, who are remembered together for their preaching against idolatry. A further speculative tradition, noted but not asserted by the sources, would identify Tertius with Silas; this remains uncertain.