Terentius was maybe the 5th-century Roman general or military commander (Greek: Strategos) under Emperor Constantine III Zosimus, 6.4.2. However Zosimus names Terentius as commander in Spain, a figure otherwise unattested. In the parallel tradition (Olympiodorus, Orosius), this role is held by Gerontius, making the identification plausible but not textually demonstrable. who accompanied Constans II, the son of the emperor, during the campaign against the cousins of Honorius in the Diocese of Hispania, which is present-day Spain. Historians consider him an obscure person, whose existence is uncertain.
Sources Terentius is known only from a single source, which is from the Greek historian Zosimus who mentions him in his historical account, Historia Nova, as an experienced commander along with Apollinarius, prefect of Constant's court, as companions.
References
Bibliography The Usurpers Constantine III (407-411) and Jovinus (411-413), in Britannia, Vol. 29 (1998), pp. 269-298