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Caio
BoyMeaning of Caio: Latin: 'to rejoice'
Caio is a boy's name most strongly associated with Portuguese naming. It has 4 letters and 1 syllable, and it is familiar but far from overused — 3226th most popular boys' name in the United States in 2025 and 1076th in England & Wales.
US rank 2025
#3226
35 babies in 2025
England & Wales 2024
#1076
27 babies in 2024
US babies since 1880
722
First recorded 1990 · peak 2023
Trend
rising
Style: uncommon
Popularity over time
Gender split
100% boys · 0% girls, based on US, UK and international usage.
Origins & cultures
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