Theory
Primarily a girl's name of Greek origin with 142 recorded births. Also given to 81 boys.
Meaning & Origin
A description of an event or system that is considered to be accurate.
Theory is a girl's and boy's baby name of Greek origin, from the Greek theoria, meaning 'contemplation' or 'a looking at.' Used as a word name, it conveys intellectual curiosity, the pursuit of understanding, and a mind that questions the world around it.
Bold and cerebral, Theory is a name for parents who want to plant the seeds of deep thinking from birth — a name that carries the weight of every great idea ever imagined.
EtymologyShow more
Theory is cataloged under the Greek naming tradition. Greek-origin names have traveled through mythology, early Christianity, and scholarly tradition to become fixtures in naming cultures worldwide.
In the U.S., Theory has been recorded as a girl's name since 2006, with 142 total births. Browse the Greek names hub on this site to explore the broader family.
At a Glance
Popularity Over Time
Theory has 14+ years of history in the U.S., first appearing in 2006.
Popularity by Decade
| Decade | Births | Trend |
|---|---|---|
| 2020s | 77 | ▲ |
| 2010s | 60 | ▲ |
| 2000s | 5 | — |
The Story of Theory
A Gen Alpha name
Peaking in 2023, Theory is a fresh, modern favorite. Girls named Theory are most likely born between 2013 and 2024.
How rare is Theory?
Only about 1 in every 257,143 babies born in 2024 was named Theory — a truly uncommon choice.
The journey through the decades
First appeared in the records in 2006, peaked in the 2020s with 77 births that decade.
Theory by the numbers
- Would fill 3 school buses
Year-by-Year Data
View complete yearly data(14 years, 2006–2024)
| Year | Births | Rank |
|---|---|---|
| 2024 | 14 | #7889 |
| 2023 | 19 | #6383 |
| 2022 | 18 | #6685 |
| 2021 | 18 | #6661 |
| 2020 | 8 | #12043 |
| 2019 | 8 | #12348 |
| 2018 | 7 | #13675 |
| 2017 | 5 | #18211 |
| 2016 | 8 | #12788 |
| 2015 | 7 | #14366 |
| 2014 | 8 | #12975 |
| 2013 | 9 | #11884 |
| 2012 | 8 | #13366 |
| 2006 | 5 | #19831 |
Source: U.S. Social Security Administration. Showing years with 5+ recorded births.
Theory as a Boy's Name
Though more common for girls, Theory has a notable history as a boy's name too, with 81 births since 2009.
Frequently Asked Questions
Is Theory a boy's or girl's name?
When was Theory most popular?
How popular is the name Theory?
Can Theory be used for both boys and girls?
Explore More
Data source: U.S. Social Security Administration, 2006–2024