What does Caio mean and where does it come from?
Caio is a popular male name in Portuguese-speaking countries, particularly in Brazil and Portugal. It originates from the Latin name 'Gaius', which is linked to the meaning of joy and happiness. The name has ancient roots, with notable historical figures including individuals from Roman times. Caio
Cultural significance
Caio has been a cherished name across cultures, particularly in Portugal-speaking communities, where it reflects values of rejoice, happy.
Peak popularity
Reached #3322 in 2025 — currently #3322 in the US.
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Related Reading
Portugal-origin baby names with timeless appeal
Browse names →How else can you spell Caio?
Same sound, different look — useful if you want something slightly more distinctive
What middle names flow best with Caio?
Caio works best with short, strong middle names — one or two syllables keep the full name from becoming a mouthful
Caio Jack
One syllable · timeless choice
Caio John
One syllable · timeless choice
Caio Miles
One syllable · vintage charm
Caio Brooks
One syllable · timeless choice
Caio Gael
One syllable · timeless choice
Caio Quinn
One syllable · timeless choice
How popular is Caio right now?
Rising fast — up 386 spots — currently #3322 in the US out of 135.5k tracked names
| Year | US Rank | Births | vs Prior Year |
|---|
| 2025 | #3322 | 35 | ▲ up 386 · +17% births |
| 2024 | #3708 | 30 | ▼ down 645 · -25% births |
| 2023 | #3063 | 40 | ▲ up 723 · +38% births |
| 2022 | #3786 | 29 | ▼ down 279 · -9% births |
| 2021 | #3507 | 32 | ▲ up 668 · +33% births |
| 2020 | #4175 | 24 | ▲ up 184 · +4% births |
| 2015 | #4359 | 23 | ▼ down 760 · -23% births |
| 2010 | #3599 | 30 | ▲ up 434 · +30% births |
| 2005 | #4033 | 23 | ▲ up 2163 · +109% births |
| 2000 | #6196 | 11 | ▼ down 746 |
| 1995 | #5450 | 11 | ▲ up 2522 · +83% births |
| 1990 | #7972 | 6 | — |
The story of Caio
Caio is a relatively modern name, first appearing in US records in 1990. With 556 total births recorded, Caio remains relatively uncommon. The name has grown more popular over time, rising from #7972 in 1990 to #3063 in 2023.
Names that peaked alongside Caio in 2025:
Caio by decade
Caio peaked in the 2020s. See all 2020s names →
| Decade | Births | |
|---|
| 1990s | 73 | |
| 2000s | 209 | |
| 2010s ★ | 250 | |
| 2020s | 89 | |
💎Caio has only 556 total recorded births since 1990 — rarer than 99% of names in our database.
What are good nicknames for Caio?
What names sound and feel like Caio?
Based on sound, origin, and style — parents who love Caio also consider these
How is Caio written in other languages?
What are the girl versions of Caio?
Common questions about the name Caio
What does the name Caio mean?
Caio means "rejoice, happy" — a name rooted in Portugal tradition that carries both historical depth and timeless appeal. The meaning reflects values that have made this name endure across generations.
How popular is the name Caio?
Caio is currently a distinctive and less common name as a boy name in the US and is rapidly gaining popularity — searches for Caio have increased significantly in recent years.
What is the cultural origin of Caio?
Caio originates from Portugal tradition. Portugal names tend to carry strong cultural heritage and have spread across the world through migration, literature, and religion over centuries.
How do you pronounce the name Caio?
Caio is a three-syllable name pronounced KAH-EYE-oh. The pronunciation is straightforward for English speakers, and the name reads clearly on paper — an important practical consideration for parents.
What sibling names go well with Caio?
Caio pairs beautifully with sibling names that share a similar Portugal heritage or complement its melodic and flowing sound. Names with a similar vibe create a cohesive sibling set without matching too closely.