Gaius

• (praenominal abbreviation): C., G. (less frequently)
• (archaic or hypercorrect): Cāius, Cājus
• Gājus

For Gāvius, from Proto-Indo-European *geh₂w- (“to rejoice”). Cognate with gaudeō, gaudium.

• (Classical) IPA^(key): /ˈɡaː.i.us/, [ˈɡaː.i.ʊs]

Gāius m (genitive Gāiī); second declension

1. A masculine praenomen, in particular:

   • Qui totus servatus est in Gaiorum et Quintorum laterculis.^source

     Which was kept in its entirety on the registers of Gaiuses and Quintuses.

   1. Gaius (an eminent jurist who lived in the second century A.D.)
   2. Caligula, the emperor Gaius Julius Caesar Augustus Germanicus

• 1876, "C" in the Encyclopædia Britannica, 9th ed., Vol. IV, page 616:

  The symbol [C] retained its old value [/ɡ/] only when as the initial letter it represented the names Gaius and Gnæus, which, in consequence, are often erroneously written and sounded Caius and Cnæus.

Second declension.

¹Found in older Latin (until the Augustan Age).The noun Gāius possesses several irregularly syncopated forms in the nominative, dative, ablative, and vocative plural.

• Gāia f (praenomen)
• Gāiānus (“of, pertaining to Caligula”, adjective)
• Gāīpor (“male slave of Gaius”)

• Ancient Greek: Γάϊος (Gáïos)
• Italian: Caio
• Portuguese: Gaio, Caio
• Russian: Гай (Gaj) (possibly)
• Spanish: Gayo

• Gaius in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• Gaius in Gaffiot, Félix (1934) Dictionnaire Illustré Latin-Français, Hachette