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Io
OriginJapanese
Meaning"rely on + emperor, rely on + hero"
GenderBoy & girl
US rank · boys#12744
2025 SSA
US rank · girls#15815
2025 SSA
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 October 2026, Io ranked #12744 in US births in 2025 SSA, peaked at #9951 in 2020.
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Variations & nicknames
- EyoGirl
Io in blog posts
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