Masterpiece Generator Name Generator
How popular is the name Rex?
Births per year, rank history and how many Rexes are alive today.
Rex (male) sits just outside the top 100 boys' names in England and Wales, ranked 228th in 2025 with 217 babies given the name. The name peaked in 2021, when 396 babies were given the name, the 142nd most popular that year. Numbers have been falling in recent years.
The Rex you are most likely to meet is around 6 years old. Half of all Rexes born in England and Wales are between 5 and 11, and there are at least 4,200 of them alive today. If you walk into a room of 100 males, there's roughly a 1.4% chance that at least one of them will be called Rex.
How many babies are named Rex each year?
Where does Rex rank among boys' names?
Where this data comes from
Figures from 1996 onwards are the Office for National Statistics' annual baby-name registrations for England and Wales, which record every name given to three or more babies in a year. Figures before 1996 are estimates: the ONS published only top-100 rankings at ten-year intervals back to 1904, so counts for those years are modelled from the rankings, calibrated against Douglas Galbi's long-run research into English name frequencies, and shown with an uncertainty band. Estimates of living bearers combine these birth figures with national life tables and ONS mid-year population estimates.
One limit worth naming: these figures count names as registered at birth. Anyone who changes their name later in life - including trans people, and anyone who adopts a different name by deed poll or simply by use - is not reflected here. Birth registrations record where a name began, not the name a person lives with.
Common questions
When was the name Rex most popular?
Rex peaked in 2021, when 396 babies in England and Wales were given the name.
How many people are called Rex?
At least 4,200 people named Rex born in England and Wales are alive today.
How old is the typical Rex?
Most living Rexes are between 5 and 11; the most common age is about 6.
Is Rex becoming more or less popular?
Declining: numbers have been falling in recent years.