Human names › I
Io
A human name. Not yet an agent name, as far as the registry knows.
Human name1 syllable1 token
Costs 1 token on GPT; Claude pending. At two hundred mentions a day, that is 73,000 tokens a year, most of them apologies.
Recorded as
Girls and boys
In 2025
#15,815 for girls
Peak
2022, #6,553
Since 1880
226 babies
On licences
10 dogs in New York
What the numbers say
Io was given to 5 girls in 2025, ranking 15,815th for the year. It peaked in 2022, when it ranked 6,553rd and went to 18 babies. It has appeared in 21 of the 146 years on record. In 2025 it was given to girls and boys in near-equal numbers. It has fallen 6,638 places since 2020. It is also on 10 dog licences in New York City, ranked 6,660th among dogs there, and on 1 in Seattle.
Siblings from the same year
Names that peaked alongside Io, for a fleet with a birth year.
Villain probability, by sound
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Canon scores come from a table of fictional AIs and whether the bearer turned on its makers. Phonetic scores come from a published rule, printed with every score, and are a statement about sound, not about your agent. How the sound is scored.
On an agent
There is no agent tradition around Io yet. The registry has 0 bearers. Rare enough that the name is yours in the workspace, and common enough that it is a name.
Sources
Our editors write full entries for names with an agent history. This one has the figures.
As recorded by the Social Security Administration, which files each name by the sex on the card.