Rex
How to say it: REKS · /ˈrɛks/
Latin: 'king'. Used as a given name in English-speaking countries since the 19th century.
Rex was the 794th most popular boys’ name in the United States in 2025, given to 281 babies (Social Security Administration). Its busiest decade was the 1950s, its births are down about 25% in ten years, and it is projected to slip to #927 by 2030.
Updated · SSA 2025 data, published May 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #794 |
|---|---|
| Babies born in 2025 | 281 |
| Share of births | 1 in 11,798 |
| Peak decade | 1950s |
| Change over 10 years | −25% |
| Projected rank for 2030 (estimate) | #927 |
Sources: Social Security Administration (SSA). How we compute these figures.
Its life, decade by decade
Long ago Rex hit its high in the 1950s. It remains well below that peak today and looks set to slip further.
What goes with it
One sharp beat gives Rex a strong and kingly air. Gus shares its punchy style.
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Rex is about under 1 in 200.
Around the world
This spelling is used in Dutch, English, German.
England and Wales: #230.
Famous people named Rex
- Rex Tillerson (born 1952)69th United States Secretary of State
- Rex Linn (born 1956)American actor
- Rex Stout (1886–1975)American writer
From Wikidata and Wikipedia
Good to know
- Latin word for 'king' (cf. T. rex); widely recognized
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