Caio comes from the Latin / Brazilian tradition, meaning Earth, rejoice, rejoicing one.
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How popular is Caio?
2023peak year
Today, Caio is rarely chosen — ranked well outside the top 1,000 (around #4079), with only about 28 babies given the name per year. But it wasn't always this way. At its peak in 2023, 40 babies were given the name (ranked #3063 nationally). Its strongest stretch was the 2010s. Caio has been trending upward in recent years. In all, around 687 babies have been registered as Caio since 1880.
Year-by-year registrations1880–2024 · U.S. Social Security data
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