Theory
Meaningtheory · English
- US rank
- #7,679
- Syllables
- 2
- Peak
- #5,874 in 2022
10 babies were named Theory in the US in 2025. It has climbed 2,926 places in five years.
Save adds it to your list. Vote moves it up the top voted names.
US births per million boys, 2009–2025
Similar names
Popularity: U.S. Social Security Administration (babies with 5+ births per year).
Did you know?
A few things about Theory you might not know, from US birth records. Handy for convincing a partner, or a grandparent.
- How commonAbout 1 in every 169,492 baby boys born in the US in 2025 was named Theory, 10 babies in all. In a typical school of 500 kids, your Theory would very likely be the only one.
- HistoryTheory first shows up in US birth records in 2006, the first year at least 5 babies got it. That makes it a fairly new name, younger than many of today's parents.
- Best yearIts best year was 2022, when it reached #5,874.
- New on the sceneTheory wasn't given to enough babies to be counted in 2000. It only took off after 2009.
- TrendTheory has climbed 2,926 places in the US rankings over the last five years and now sits at #7,679. Fast risers like this often keep climbing, so expect to hear it more.
- Boy or girlTheory is given to both boys and girls: 67% of the 30 babies named Theory in 2025 were girls. That makes it one of the names that truly works for either.
- MeaningIn English, Theory means “theory”.
About the name Theory
Theory is a boy name of French origin meaning “theory”. It has 6 letters and 2 syllables, starting with T and ending in “-ory”. US birth records list Theory for boys from 2009 to 2025, in 11 of those 17 years. Its best year was 2022, when it ranked #5,874 among boy names. In 2025 it ranked #7,679, with 10 babies.
Origin:French names
| Decade | Babies per million | About 1 in |
|---|---|---|
| 2000s | 3.0 | 333,333 boys |
| 2010s | 1.5 | 671,141 boys |
| 2020s | 5.6 | 178,042 boys |
More French boy names
- Boy name: Sebastian · venerable
- Boy name: Leo · lion
- Boy name: Daniel · God is my judge
- Unisex name: Gabriel · God is my strength
- Unisex name: Wyatt · brave in war
- Boy name: Charles · free man
- Unisex name: Beau · handsome
- Boy name: Robert · bright fame
Questions about the name Theory
What does the name Theory mean?
Theory means “theory” in English.
What is the origin of the name Theory?
Theory has French roots in our records. Other French names include Sebastian, Leo, Daniel.
Is Theory a boy or girl name?
Theory is a boy name, though a few girls get it too.
How popular is the name Theory?
Theory ranked #7,679 for US boys in 2025, given to 10 babies. Its best year was 2022 (#5,874).