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Theory

♂ Boy

Pronounced THEER-ee /ˈθiːəri/Medium

Meaning: From the English word theory, 'a system of ideas or explanation,' from Greek theoria, 'contemplation.' A bold, cerebral modern word name. Routes into given-name use are new.Low

In 30 seconds: A cerebral word name: Theory names a system of ideas (said 'THEER-ee'). Bold, modern, and routes uncertain.

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Origin LowEnglish

MeaningFrom the English word theory, 'a system of ideas or explanation,' from Greek theoria, 'contemplation.' A bold, cerebral modern word name. Routes into given-name use are new.

U.S. rank (2024)#10763 ↘ Falling

2024 U.S. births7 boys (0.00% of U.S. boys)

Peak year2022

Total births (all-time)≈ 81

Popularity in the U.S. · SSA data

U.S. births per year (Social Security Administration, 1880–present). Pink marker = peak year.

SSA data updated May 2026. How we source & verify this data.

History & Origin

Theory draws on the English word for a system of ideas, from Greek theoria, 'contemplation.' As a given name it reads inventive and cerebral, and its route into use is recent, which we note. Bold and modern (said 'THEER-ee').

In the U.S. it appears very rarely, a fresh word name. Cerebral, bold, and route-uncertain.

Did you know? Theory comes from the word for a system of ideas - rooted in Greek theoria, 'contemplation' - a bold, cerebral modern word name whose routes into use are new, which we note (said 'THEER-ee').

Overall data confidence 32%

References — Theory — Word name from Greek theoria; routes new

Variations

Theori

Nicknames

TheoRee

Famous Bearers

Famous bearers coming soon.

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Frequently Asked

What does the name Theory mean?

Theory names a system of ideas, from Greek theoria; its routes into use are new, which we note.

How do you pronounce Theory?

It's said THEER-ee /ˈθiːəri/ — two syllables, stress on the first.

Is Theory a boy or girl name?

Here Theory is used as a boy's name; it reads gently unisex.

How popular is Theory?

Theory is a very rare, modern word name for boys in the U.S.