Io
50% girls · 50% boys
About Io
Io is most familiar to English speakers as a female name from Greek mythology, but in Japan it's used for both sexes.
Io for girls#15815 US
Io may be one of the slightest names in the book, but there aren't many two-letter names with as much substance as this Greek mythological example. Io, a name used for the largest moon of Jupiter, was in classic myth raped by Zeus and escaped from him by changing herself into a cow.
Pronounced EE-oh.
As of November 2026, Io ranked #12744 for boys and #15815 for girls in US births in 2025 SSA, peaked at #9951 for boys in 2020 and #6548 for girls in 2022, Nameberry popularity #737 for boys.
Popularity & trends
World rankings
Io for boys
Similar names
These 40 names were selected by our users looking for other names like Io.
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Io on lists
Io in pop culture
- IoGirl
one of the Galilean moons
- IoGirl
meaning of "I" in Italian
- Io EchoGirl
American indie,rock band
- IoGirl
meaning of "Something" in Esperanto
Variations & nicknames
- EyoGirl