Rising since 2010, #5,917 for girls today.
Popularity of Theory since 2006
Babies named Theory per year in U.S. Social Security records.
Data table (by decade)
| Decade | Girls | Boys |
|---|---|---|
| 2000s | 5 | 6 |
| 2010s | 60 | 28 |
| 2020s | 100 | 58 |
Meaning & origin
Theory is a modern word name that first entered the U.S. naming database in 2006. It is a rare choice, ranked 5,917 in 2025, with approximately 1 in 80,363 newborns receiving the name. Its popularity peaked in 2023, and it has been rising since 2010, reflecting a broader trend of abstract noun names like Lyric, Sage, and Story. While Theory is used for both boys and girls, it skews female in practice. The name has not appeared in any top state lists, indicating its usage is scattered across the country. As a vocabulary name, its meaning is directly accessible, making it appealing to parents drawn to intellectual or philosophical concepts. Without a long history or notable bearers, Theory remains a distinctive and unconventional choice.
Theory is a modern word name adopted from the English vocabulary word 'theory', which itself comes from Late Latin 'theoria' and Greek 'theōria' meaning contemplation or speculation. It first appeared as a given name in the United States in 2006 and has gradually gained usage, primarily for girls but also for boys, reflecting a trend of abstract noun names. Its rise in popularity may be influenced by cultural figures like the R&B singer The-Dream (born Terius) and the television show 'The Big Bang Theory', though no direct connection is established.
Nicknames & variants
Nicknames: Thea, Ree
Sibling names for Theory
Names that share Theory's style, for a brother or sister.

