Born c. 92 BC,[REF] Trebonius' father was an eques,[REF] but had not been a magistrate, and the son was considered a novus homo ("new man"), one of several in Caesar's circle [REF].
During that year, Trebonius proposed a Lex Trebonia to the Tribal Assembly that the consuls Pompey and Marcus Licinius Crassus receive the provinces of Syria, Hispania Citerior and Hispania Ulterior.