tullius

Tullius is a Latin nomen used by members of the ancient Roman gens Tullia. In Roman naming practice, a male member typically bore Tullius as the nomen, indicating lineage, while the individual was further identified by a praenomen and a cognomen.

The most famous bearer of the name is Marcus Tullius Cicero (106–43 BCE), a renowned Roman statesman, orator, and writer whose works influenced Latin literature and Western political thought. The gens Tullia is known from literary and documentary sources of the late Republic, with various members who held public offices or participated in political life, though none achieved the same lasting fame as Cicero.

Etymology and related forms of the name reflect its status as a Roman family name. The feminine form is Tullia, and the root gives rise to related given names and surnames in later languages; the Italian form Tullio, for example, derives from the same lineage. The plural form used for the family is Tullii.

In modern usage, Tullius generally appears as a scholarly or historical reference to the Roman surname. It may be encountered in editions of classical texts, historical writings, or as a surname in fiction or contemporary contexts, where it signals Roman ancestry or classical associations.