Gaius Terentius Tullius Geminus

Gaius Terentius Tullius Geminus was a Roman senator of the early Roman Empire, who flourished under the reign of Claudius. He was suffect consul in the nundinium of September-December 46 as the colleague of Marcus Junius Silanus. It is inconclusive if a poet named Tullius Geminus, whose poems are included in the Palatine Anthology is the same man.

Although Steven Rutledge dates the start of his senatorial career to the reign of Tiberius, Geminus appears in the Annales of Tacitus, as prosecuting Aulus Didius Gallus Fabricius Veiento at the direction of the emperor Nero for allegedly writing a collection of lampoons on senators and pontiffs called "Codicils"; Veiento was found guilty, banished from Italy, and copies of the pamphlets burned.