the name of a family of the patrician FABIA GENS. The first member of the Fabia gens, who acquired this cognomen, was Q. Fabius Vibulanus, consul in B. C. 412, who appears to have been a son of N. Fabius Vibulanus, consul in B. C. 421. From this time the name Vibulanus was dropt, and that of Ambustus took its place. The latter was in its turn supplanted by that of Maximus, which was first acquired by Q. Fabius, son of No. 7 [see below], and was handed down by him to his descendants.