Caio — Meaning, Origin & Everything to Know
A Latin name from Portuguese, Caio carries the meaning 'rejoice; to be glad'.
Caio pairs an easy sound with real substance: in Portuguese it means 'rejoice; to be glad'. Rooted in Portuguese, Caio suits parents who want a name that feels distinctive yet easy to wear. Part of the draw of Caio is that it feels current without being invented, and meaningful without being heavy. As a son's name, Caio suggests happiness, brightness and delight and travels comfortably across languages.
| Name | Caio |
|---|---|
| Meaning | At its core, Caio carries the meaning 'rejoice; to be glad', rooted in Portuguese |
| Origin | Latin |
| Language | Portuguese |
| Gender | Boy |
| Numerology number | 1 |
| Pronunciation | CAIO |
| Popularity tier | Tier 3 |
What Does the Name Caio Mean?
At its core, Caio carries the meaning 'rejoice; to be glad', rooted in Portuguese.
The early history of Caio belongs to the Latin world, where 'rejoice; to be glad' was a quality worth naming a child for. Across generations the meaning 'rejoice; to be glad' held firm while Caio passed through families, migration and changing fashion.
Modern parents tend to hear Caio as fresh rather than old-fashioned, with 'rejoice; to be glad' giving it a positive, aspirational edge. It is exactly this balance that lifted Caio into wider use in the 2020s.
Caio carries connotations of happiness, brightness and delight; the Latin background gives that symbolism somewhere to stand.
Origin & Etymology of Caio
Latin · Portuguese
Caio comes from Portuguese, where it means 'rejoice; to be glad'. Caio spread outward with migration, recognised now well beyond its Latin origin and worn across very different cultures.
Within Latin culture, Caio connects to enduring values through its idea of happiness, brightness and delight.
How Latin names are chosen
Rome gave a child its given name at the dies lustricus, a purification held on the eighth day for a girl and the ninth for a boy. The delay was deliberate: until the umbilical stump fell away the infant was not regarded as having a separate existence, and so had no claim on a name or a fate of its own. The ceremony washed the child, presented it at the lararium before the household gods, and ended in a family feast. The praenomen given that day was only the first of the tria nomina — praenomen, nomen, cognomen — the three-part structure that marks Roman naming out from almost everything around it.
How to Pronounce Caio
CAIO — Caio is a single, simple syllable — said just as it reads. Most English speakers stress the first syllable and pronounce the rest lightly.
Popularity of the Name Caio
Caio has been climbing in recent years, with its momentum centred on the 2020s.
Popularity trends are based on historical naming pattern data and updated periodically, not real-time rankings.
Personality Traits Associated with Caio
The name Caio tends to bring joyful, playful associations to mind. Both the 'rejoice; to be glad' meaning and the rhythm of Caio feed that picture. In the traditions that link names to temperament, Caio lands on the side of happiness, brightness and delight. Character is shaped far more by the person than the name, yet Caio carries a gentle, positive feel that many parents respond to.
Caio Numerology
The name Caio carries the numerology number 1.
Run Caio through Pythagorean numerology and it settles on 1 — the Leader — independence and drive. Set beside the meaning 'rejoice; to be glad', the 1 adds another layer for parents who weigh numerology when naming.
Caio & Zodiac Connection
Caio sits naturally alongside sunny Leo and playful Gemini, signs whose temperament matches its mood. Curious how a baby named Caio might pair with their actual star sign?
Curious what your baby's zodiac sign reveals? Explore GetMyHoro →
Names Similar to Caio
Sibling Names That Go With Caio
- Caio & Davi — Pairs naturally with Caio without echoing it.
- Caio & Bento — A like-minded match in feel for Caio.
- Caio & Tiago — Sits comfortably beside Caio as a sibling name.
- Caio & Isaac — Shares a complementary sound and style with Caio.
- Caio & Asher — Pairs naturally with Caio without echoing it.
- Caio & Jude — A like-minded match in feel for Caio.
Middle Names for Caio
Caio Alexander · Caio Daniel · Caio Joseph · Caio Reed · Caio Cole · Caio Thomas
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+What does the name Caio mean?
Caio means 'rejoice; to be glad'. It comes from Portuguese and is linked with happiness, brightness and delight, which makes it a meaningful choice for a son.
+What is the origin of Caio?
Caio is Latin in origin, from Portuguese.
+What is the numerology number for Caio?
In Pythagorean numerology Caio reduces to 1 — the Leader — independence and drive.
+Is Caio a popular name?
Caio has been rising in popularity, with its strongest momentum in the 2020s.
+Is Caio suitable for any gender?
Caio is most often used as a boy's name, though naming is personal and the meaning 'rejoice; to be glad' suits any child.
+What names pair well with Caio for a sibling?
Names such as Davi, Bento, Tiago sit well beside Caio, sharing a complementary style.