Tools / Baby names / T
Theory
UnisexMeaning of Theory: American: 'word name'
Theory is a unisex name most strongly associated with American naming. It has 6 letters and 2 syllables, and it is a genuinely rare and unique choice — 4437th most popular name in the United States in 2025.
US rank 2025
#4437
30 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
257
First recorded 2006 · peak 2022
Trend
rising
Style: rare
Popularity over time
Gender split
36% boys · 64% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with T
Hebrew · 2 syllables
US #34UK #26
Greek · 2 syllables
US #4UK #8
Greek · 1 syllable
US #88UK #12
English · 2 syllables
US #630UK #39
English · 2 syllables
US #212UK #213
Greek · 3 syllables
US #211UK #382
Hebrew · 2 syllables
US #290UK #108
Greek · 1 syllable
US #355UK #66
Hebrew · 2 syllables
US #264UK #171
Greek · 2 syllables
US #746UK #29
Welsh · 2 syllables
US #316UK #253
French · 2 syllables
US #449UK #427