Given name & surname
Caio
“one who rejoices”
Caio is a variant of Caius. One Latin interpretation is “one who rejoices.”
Meaning & origin
What it means
Caio is a variant of Caius. One Latin interpretation is “one who rejoices.”
Explained through its name family
Where it comes from
Caio is a variant of Caius. An origin associated with Caius is Latin.
Explained through its name family
The story
Published U.S. birth records include this spelling as early as 1990. This is the earliest published observation available here, rather than a date for the name’s origin.
From dated birth records
Caio through the years
- Babies since 1880
- 722
- 722 boys · 0 girls
- Most popular year
- 2023
- 40 babies
- 2025
- 35
- #3,322 for boys
- 2021–25 vs 2016–20
- +33%
- Rising
Where it’s given
By the numbers
In 2025, this name appeared in 35 U.S. birth records for boys, ranking No. 3,322 among boys’ names. Average annual use for boys was 32.8% higher in 2021–2025 than in 2016–2020. In 2025, California and Florida and Massachusetts shared the largest reported state-level birth count for boys with this name (5 each). Published U.S. population figures for this spelling include 1,308 as a first name in 2020.
From Social Security birth records and U.S. Census name counts for this exact spelling. Other spellings are counted separately.
Caio’s family of names
In Italian usage, Caio has a diminutive in CAIAZZO. In Italian usage, Caio has a related form in Gaius. In Italian usage, Caio has a conventional equivalent in the Latin form Gaius.
Inner ring: nicknames and forms · outer: across languages.
Around the world
Caio has relatives in 5 languages.
3 related names in 5 languages. Point at a dot, or tab to the map and use the arrow keys.
Nicknames & forms 4
Diminutives, pet forms, short forms and variants used alongside the name.
Across languages 2
Equivalents and cognates in other languages, plus older forms it grew from.
People named Caio
- Caio LucasEmirati association football playerborn 1994
- Caio JúniorBrazilian association football player and manager (1965–2016)
- Caio BonfimOlympic racewalkerborn 1991
- Caio HenriqueBrazilian association football playerborn 1997
- Caio CanedoBrazilian and Emirati association football playerborn 1990
- CaioBrazilian footballerborn 1986
- Caio CésarBrazilian association football playerborn 1995
- Caio BlatBrazilian actorborn 1980
- Caio RibeiroBrazilian footballer and managerborn 1975
Listed by how widely each person is written about, which says nothing about the name itself.
Similar names
If you love Caio, these share its style, era, origin or sound, from outside its own family.
Kazi
“a hardworking man”
79% boys · 21% girls
Kaicyn
94% boys · 6% girls
Kaikoa
>99% boys
Kaysyn
92% boys · 8% girls
Caizen
>99% boys
Cairo
“from the city in Egypt” · “one who is victorious; from the capital of Egypt”
95% boys · 5% girls
Canyon
“from the footpath” · “from the deep ravine”
92% boys · 8% girls
Xamir
>99% boys