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:
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 (), 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)
de:Gaius it:Gaio (nome) nl:Gaius pl:Gajusz (imię) ru:Гай sk:Gaius fi:Gaius (nimi) sv:Gaius