Gaius Fabius Ambustus was consul of the Roman Republic in 358 BC, in which year, according to Livy, a dictator was appointed through fear of the Gauls.Livy, Ab Urbe Condita vii. 12 He was appointed Interrex in 355 BC.Broughton, vol i, pp.124

He was the son of Numerius Fabius Ambustus, consular tribune in 406 and 390 BC, and the brother of Marcus Fabius Ambustus, consul in 360, 356 and 354 BC.Broughton, vol i, pp.121

See also Ambustus, for a list of other men with the same cognomen Fabius Ambustus, for a list of other men used the same combination of gens name and cognomen Fabia gens

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