What does Trebōnius mean in Latin?

Trebōnius, a proper noun, means “a Roman nomen gentile, gens or "family name" famously held by”.

What is the genitive of Trebōnius?

The genitive singular is Trebōniī. Trebōnius is masculine, second declension.

In classical Latin, [trɛˈboː.ni.ʊs]; in ecclesiastical (church) Latin, [treˈbɔː.ni.us].

proper noun · masculinesecond declension

Trebōnius m sg (genitive Trebōniī or Trebōnī)

Classical[trɛˈboː.ni.ʊs]Ecclesiastical[treˈbɔː.ni.us]

Trĕbōnius, i, m.,

I. the name of a Roman gens.

I. C. Trebonius, a legate of Cœsar in Gaul, a friend of Cicero, Caes. B. G. 5, 24; 6, 40; 7, 81; id. B. C. 1, 36; 3, 20; Cic. Fam. 12, 16; 15, 20; id. Phil. 2, 14, 34; Vell. 2, 69, 1.—

II. The father of the preceding, C. Trebonius, Cic. Fam. 10, 21, 1; id. Phil. 13, 10, 23.—

III. Another of the name is mentioned, Hor. S. 1, 4, 114.