Rex: Meaning, origin and popularity
Pronounced REKS · 1 syllable
Rex means “king”, from Latin.
From Latin rex (“king”). Doublet of rajah and roy.
- Meaning
- king
- Origin
- Latin
- Pronunciation
- REKS
- US rank (2025)
- #859
- US babies a year
- about 346 (2021–2025)
- Peak
- around 1950
- Style
- Vintage, Comeback
How popular is Rex?
Rex was the #859 name in the US in 2025, given to 281 babies. Its use has been fairly steady over the last decade. It peaked around 1950.
Around the world
| Country | Rank |
|---|---|
| United States | #859 |
| England & Wales | #143 |
| Scotland | #198 |
| Northern Ireland | #334 |
| Australia | #600 |
How old are people named Rex?
Half of US adults named Rex are older than 65; most are between 25 and 84. (Estimated from US births by year and life tables.)
Names like Rex
Chosen by the same families or with a similar style and era.
On these lists
Questions about Rex
What does the name Rex mean?
Rex means “king”. It comes from Latin.
How do you pronounce Rex?
Rex is pronounced REKS.
How popular is the name Rex?
Rex was the #859 name in the US in 2025, given to 281 babies. Its use has been fairly steady over the last decade. It peaked around 1950.
How old are people named Rex?
Half of US adults named Rex are older than 65. Most are between 25 and 84.