Theory
UnisexTheory has been given to 257 babies in the U.S. since 2006. It peaked in 2022. In 2025, about 1 in 80,363 girls was named Theory.
Popularity over time births per year, 1880–2025
Total babies
257
Peak year
2022 (33 babies)
Rank in 2025
Below top 1000
First recorded
2006
10-year trend
▲ +114%
Gender split
64% girls / 36% boys
Names with a similar vibe
Same primary gender, peaked around the same years, and roughly as common as Theory.
Sibling name ideas for Theory
Same era and popularity as Theory, avoiding matching initials or rhymes.
FAQ
How popular is the name Theory?
Theory has been given to 257 babies in the U.S. since 2006. It ranked below the top 1000 in 2025.
When did the name Theory peak?
Theory peaked in 2022, when 33 babies were given the name.
Is Theory a girl or boy name?
Theory is a unisex name, used for both girls and boys.
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