Caio as a Baby Name. Meaning and Origin of Caio

What is the meaning of the name Caio ?

The baby name Caio is a Male name , 2 syllables long and is pronounced Portuguese: [ˈkaj.u] (KAI-oh); English: /ˈkaɪ.oʊ/ (KAI-oh).

Caio is Latin in Origin.

Caio is the Portuguese and Italian form of the ancient Latin praenomen Gaius (also spelled Caius in Classical sources), with the initial C/G interchange typical of early Latin. Its etymology is uncertain but commonly linked to gaudere, “to rejoice,” giving the meaning “joyful” or “one who rejoices.” The name spread through Romance languages, yielding Spanish Cayo and the rarer Italian Gaio; in Brazil a modern variant with K, Kaio, also appears. A related feminine in Latin is Caia/Gaia, remembered in the Roman wedding formula “Ubi tu Gaius, ego Gaia.”

Caio traces to prominent Romans such as Gaius Julius Caesar, Gaius Octavius (Augustus), and the jurist Gaius, and to the early Christian Pope Caius (Saint Caius). In contemporary use it is most common in Brazil, where it gained popularity from the late 20th century, while remaining occasional in Portugal, Italy, and Spanish-speaking countries.