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Rex
BoyMeaning of Rex: Latin: 'king'
Rex is a boy's name most strongly associated with Latin naming. It has 3 letters and 1 syllable, and it is one of today's most-chosen names — 867th most popular boys' name in the United States in 2025 and 216th in England & Wales.
US rank 2025
#867
281 babies in 2025
England & Wales 2024
#216
228 babies in 2024
US babies since 1880
60,590
First recorded 1880 · peak 1952
Trend
stable
Style: popular
Popularity over time
Gender split
100% boys · 0% girls, based on US, UK and international usage.
Origins & cultures
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Irish · 1 syllable
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Hebrew · 2 syllables
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French · 2 syllables
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English · 2 syllables
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