Tullus (/ˈtʊləs/ or rarely /ˈtʌləs/) is a Latin praenomen, or personal name, which was used from the earliest times to the end of the Roman Republic.
Although never particularly common, the name gave rise to the patronymic gens Tullia, and it may have been used as a cognomen by families that had formerly used the name.
Writing at the time of Cicero, the scholar Marcus Terentius Varro listed Tullus amongst several praenomina that he considered obsolete, although the foregoing examples show that it was still in limited use.
[3][4][5][6][7] Tullus appears to be a Latin name, as most of the families in which it occurs are of Latin origin, but the name may also have been common to the Oscan and Umbrian languages, as evidenced by the Volscian leader, Attius Tullus.
The name seems to have confused some Latin writers, including the historian Titus Livius, who wavered between regarding it as praenomen or cognomen.