Bruttius Balbus, a candidate for duovir[?] of Pompeii, mentioned in political graffiti (from Walls of Pompeii (http://www.cis.vt.edu/fac/thb/1124/wallsofpompeii))
... of authority.
The first to have the title of "Tyrant" was Pisistratus in 560 BC.
In modern times Tyrant has come to mean a dictator who rules with ...