Rising since 1990, #3,314 for boys today.
Popularity of Caio since 1990
Babies named Caio per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 1990s | 73 |
| 2000s | 209 |
| 2010s | 250 |
| 2020s | 190 |
Meaning & origin
Caio, a Latin name meaning "to rejoice," has been used in the United States since at least 1990, when it first appeared in Social Security records. In 2025 the name ranked 3,314 with roughly 1 in 48,802 boys receiving it, continuing a rising trajectory that began in the 1990s. Its peak year so far has been 2023. The name is most popular in states with large Portuguese and Italian communities, including Massachusetts, Florida, and California. Caio's appeal lies in its ancient roots and modern, international sound, making it a distinctive choice that fits well with other short, vowel-ending names like Luca and Enzo.
Caio is an Italian and Portuguese form of Gaius, an ancient Latin personal name of uncertain meaning but traditionally linked to gaudere, meaning "to rejoice." It was borne by several notable figures in Roman history, including the jurist Gaius and the emperor Caligula (Gaius Caesar). The name has been consistently used in Italy and Brazil, where it remains a popular choice for boys.
Where Caio is most popular
Births per 100,000 boys by state, 2025. The lightest shade means too few recorded births.
Nicknames & variants
Nicknames: Cai
Sibling names for Caio
Names that share Caio's style, for a brother or sister.
