What does Rex mean?
Rex means “king”.
Rex has Latin roots and is associated with the meaning “king”.
Nicknames & variations
No nicknames or variations are listed for Rex yet.
How popular is Rex?
United States · 2025Explore how often Rex is used and how its ranking has changed.
- US boys rank
- #859 2025 · #1 is most popular
- Boys named Rex
- 281 Recorded births in 2025
- Change in births
- 12.2% Fewer than 2024
Rex over time
United States · Boys
Recorded births
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Yearly data & usage
Rankings are calculated separately for girls and boys. The summary highlights boys, the most common recorded usage in 2025.
| Year | Usage | US rank | Births |
|---|---|---|---|
| 2025 | Boys | #859 | 281 |
| 2024 | Boys | #787 | 320 |
| 2023 | Boys | #722 | 368 |
| 2022 | Boys | #697 | 380 |
| 2021 | Boys | #698 | 380 |
| 2020 | Boys | #683 | 377 |
| 2019 | Boys | #651 | 410 |
| 2018 | Boys | #631 | 421 |
| 2017 | Boys | #607 | 434 |
| 2016 | Boys | #633 | 423 |
| 2015 | Boys | #680 | 374 |
| 2014 | Boys | #661 | 389 |
Years reflect available birth records. Missing records do not mean zero births.
Names like Rex
Explore the connection, then save your favorites to compare.
Oliver
Mostly boys- Meaning
- Elf army; ancestor's relic; olive tree
Shares an origin with Rex.
Lucas
Mostly boys- Meaning
- Man from Lucania
Shares an origin with Rex.
Sebastian
Mostly boys- Meaning
- Person from ancient city of Sebastia, venerable
Shares an origin with Rex.
Leo
Mostly boys- Meaning
- Lion
Shares an origin with Rex.
Julian
Mostly boys- Meaning
- Uncertain; proposed meanings include youthful or downy-bearded
Shares an origin with Rex.
Santiago
Mostly boys- Meaning
- Saint James
Shares an origin with Rex.
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