Caio

Caio is a masculine given name used in Italian and Portuguese-speaking cultures. In Italian, Caio is the standard form of Gaio, a name that ultimately derives from the Latin praenomen Gaius. In Portuguese, Caio is a contemporary given name that has become common in Brazil and Portugal. The exact meaning of the Latin Gaius is uncertain, but the name circulated widely in antiquity.

Caio belongs to a family of related forms including Gaio (Italian) and Caius (Latin). Across Romance languages, the name appears in various spellings, reflecting regional phonology. In modern times, Caio is particularly associated with Brazilian naming practices, where it is widely used for boys.

Notable people with the given name Caio include Brazilian actor Caio Blat. The name is also borne by several Brazilian athletes and artists, illustrating its broad presence in contemporary Portuguese-speaking culture.