Names of persons in the Codex Mediceus prior exhibit familiar corruptions, and many of the necessary corrections were easily made. The cogent evidence was often external—the same character appeared elsewhere in Tacitus, or in some other writer, and inscriptions might certify the orthography of a name or even permit the identification of an individual. None the less, there were, and there are, traps and uncertainties. First, an inoffensive or unimpeachable name need not be correct. Nobody would have suspected ‘Livius’ (Ann. II, 30, I—twice) : only later passages (IV, 13, 2; 28, I) showed that the person referred to was in fact Vibius Serenus. And ‘Vescularius Atticus” (Ann. VI, 10, 2) would stand but for ‘Vescularius Flaccus ’ (II, 28, I). Secondly, the rarity (genuine or only fancied) of a name has often been allowed to impugn it. On the contrary, if a gentilicium is uncommon, or even unique, that is no ground for discomfort. The nomenclature of Italy is startling, fantastic and myriad in its manifestations. The Annals of Tacitus display names which, deceptively familiar from their occurrence in a classical text, are yet of a rarity to adorn an onomatological aviary.