Meaning of the nameCaio
- Male
- Latin origin
- Cai-o
- Biblical name
Caio is a male name of Latin origin, the Portuguese form of Gaius, an ancient Roman given name of uncertain meaning.
Meaning
The meaning of Caio is not known for certain. No reliable source documents it, so we give none; below are the origin of the spelling and the official figures.
- People (2022)
- 286,597
- Rank in Brazil
- #106
- Median age
- 17 years
- 2010 Census
- 227,778
- people
Caio in the 2022 Census
People with the first name Caio, by the decade they were born. In the chart, 70 = the 1970s and 20+ = 2020 to 2022. The largest group was born in the 2000s (99,524 people).
2,094 women 284,503 men
Source: IBGE, 2022 Demographic Census, Nomes no Brasil. The census counts the first name of people alive in 2022; small counts are not published, and the first group covers everyone born before 1940. How to read these data.
Where the name Caio is most common
States with the highest share of people named Caio in the population, in the 2022 Census.
- Rio de Janeiro 0.222%
- Distrito Federal 0.210%
- São Paulo 0.176%
- Amapá 0.157%
- Pernambuco 0.146%
All states
| State | People | % of population |
|---|---|---|
| São Paulo | 77,974 | 0.176% |
| Rio de Janeiro | 35,568 | 0.222% |
| Minas Gerais | 29,001 | 0.141% |
| Bahia | 19,445 | 0.138% |
| Pernambuco | 13,223 | 0.146% |
| Paraná | 11,604 | 0.101% |
| Ceará | 10,877 | 0.124% |
| Pará | 9,694 | 0.119% |
| Goiás | 8,699 | 0.123% |
| Santa Catarina | 7,700 | 0.101% |
| Maranhão | 7,172 | 0.106% |
| Distrito Federal | 5,922 | 0.210% |
| Rio Grande do Sul | 5,779 | 0.053% |
| Amazonas | 5,592 | 0.142% |
| Espírito Santo | 5,332 | 0.139% |
| Paraíba | 5,258 | 0.132% |
| Rio Grande do Norte | 4,144 | 0.126% |
| Alagoas | 3,773 | 0.121% |
| Piauí | 3,613 | 0.110% |
| Mato Grosso do Sul | 3,582 | 0.130% |
| Mato Grosso | 3,489 | 0.095% |
| Sergipe | 2,773 | 0.126% |
| Rondônia | 1,808 | 0.114% |
| Tocantins | 1,637 | 0.108% |
| Amapá | 1,153 | 0.157% |
| Acre | 996 | 0.120% |
| Roraima | 789 | 0.124% |
States with fewer than 15 people with the name are not shown: IBGE does not publish those counts.
About the name Caio
Caio comes from the Latin Caius, a variant of Gaius, an ancient Roman given name. Behind the Name considers the meaning of Gaius uncertain: it perhaps comes from the Latin gaudeo, 'to rejoice', or from an unknown Etruscan origin; Wiktionary also links it to gaudeō. Gaius appears in the New Testament, and Behind the Name lists Caio as the Portuguese and Italian form. In the 2022 Census, IBGE recorded 286,597 people named Caio, with a median age of 17. The name is almost always male and gained ground among people born in the 1990s and 2000s; Kaio, Kayo and Cayo write the same sound with K or Y.
This is the traditional and most common spelling in the group, with C and the ending -o.
Other spellings of Caio
Sources
- Wiktionary: Caio · en.wiktionary.org · origin
- Wiktionary: Gaius (Latin) · en.wiktionary.org · origin
- Behind the Name: Gaius · behindthename.com · origin
- Behind the Name: Caio · behindthename.com · origin
Questions about the name Caio
What does the name Caio mean?
The meaning of Caio is not known for certain: no reliable source documents it. So we give no meaning; the page shows the origin of the spelling and the official figures.
How many people are named Caio in Brazil?
IBGE's 2022 Census recorded 286,597 people with the first name Caio, which ranks it number 106 among the country's names. The largest group was born in the 2000s.
Is Caio a boy's or a girl's name?
Caio is a male name: in the 2022 Census, 2,094 women and 284,503 men had this name.
What is the origin of the name Caio?
Caio is a name of Latin origin. The sources are listed at the end of the page.
In which Brazilian state is Caio most common?
Proportionally, in Rio de Janeiro: 0.222% of the state's population is named Caio (35,568 people), according to the 2022 Census.
What are the other spellings of Caio?
Kaio, Kayo and Cayo. IBGE counts each spelling separately.
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Spotted a mistake? Report a correction for Caio with a source. See the methodology.