{{About|the name|the Cambridge college|Gonville and Caius College, Cambridge}} In Latin, '''Caius''' is an archaic spelling of the Latin praenomen Gaius, pronounced /ga:ius/. In early Latin, the letter C was used for both /g/ and /k/; and the names Gaius and Gnaeus were spelt Caius and Cnaius and continued to be so in inscriptions, after the letter G was introduced, and C was confined to the /k/ sound. Notably, the name of Gaius Iulius Caesar is abbreviated CIC.
In English, Caius is a latinized spelling of the last name of John Keys of Gonville and Caius College, Cambridge.
'''Caius''' may refer to: {{TOC right}}
==People== ===Given name=== ====Ancient world==== * Pope Caius (died 296), Bishop of Rome and martyr * Caius (bishop of Milan), bishop of Milan in the early 3rd-century, saint * Caius (presbyter), early 3rd century Christian writer * Caius Largennius (died c. 50), Roman legionary
====Modern era==== * Caius of Korea (1571–1624), Catholic missionary, one of the ''Martyrs of Japan'' * Caius Brediceanu (1879–1953), Romanian politician and diplomat * Caius Gabriel Cibber (1630–1700), Danish sculptor * Caius Iacob (1912–1992), Romanian mathematician and politician * Caius Lungu (1989–2025), Romanian footballer * Caius Novac (1821–?), Romanian footballer * Caius Welcker (1885–1939), Dutch footballer
===Surname=== * Jean Ferdinand Caius (1877–1944), French botanist and naturalist who worked in India * John Caius the Elder ({{fl.|1480}}), English poet * John Caius (1510–1573), English physician and second founder of Gonville and Caius College, Cambridge * Thomas Caius (died 1572), English academic and administrator, Fellow and Master of University College, Oxford
==Fictional characters== ===In Shakespeare's plays=== *Caius, in the play ''King Lear'', the name that the Earl of Kent takes when in disguise *Caius, the protagonist in ''Coriolanus'' *Caius Lucius, Roman ambassador and later general in ''Cymbeline'' *Doctor Caius, a French doctor in ''The Merry Wives of Windsor'' *Caius, a casual nomer used in Camus’ play “Caligula” to refer to the tyrannical emperor of the same name.
===Other=== *Caius, in ''Sir John in Love'', a 1929 English opera by Ralph Vaughan Williams, based on Shakespeare's ''The Merry Wives of Windsor'' *Caius, in the book ''The Skystone'' by Jack Whyte *Caius, in the ''Twilight'' series by Stephenie Meyer *Caius Ballad, the main antagonist in the video game ''Final Fantasy XIII-2'' *Caius Cosades, Grand Spymaster of the Blades in the video game ''The Elder Scrolls III: Morrowind'' *Caius, in the 1960 film ''Spartacus'', played by John Hoyt *Caius Lao Vistaille, one of the protagonists in the manga (and later anime based on it) ''The Titan's Bride'' *Caius Qualls, the main protagonist of the video game ''Tales of the Tempest'' * Caius, an AI warrior played by Cameron Monaghan in the film ''Tron: Ares''
==See also== *Caius Choirbook, an illuminated choirbook *Caio (disambiguation) *Cayo (disambiguation) *Cai (name)
{{given name|type=both}} Category:Masculine given names Category:Romanian masculine given names
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