UK boy's name
Casimir
A masculine name with Polish roots meaning "destroyer of peace".
For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.
Casimir is a boy's name in the UK records. People looking for Casimir popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #3688, with 5 babies registered with the name. Its strongest year in the published records was 2009, with 6 births.
This profile covers 39 England and Wales registrations across 10 recorded years from 1997 to 2024. The figures come from ONS England and Wales, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.
The latest count is about 83% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 39 living people in the UK are called Casimir. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2025 or 2026.
Key insights
- • Casimir ranked #3688 for boys in England and Wales in 2024, with 5 registrations.
- • The name peaked in 2009, when 6 boys were registered as Casimir.
- • About 39 living people in the UK are estimated to have Casimir as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#3688
2024
Births in 2024
5
Latest year
Peak year
2009
6 births
Estimated living
39
2026
Meaning
What does Casimir mean?
The name Casimir has its origins in the Polish language, derived from the Slavic elements "kazic" meaning "to destroy" and "mir" meaning "peace." It was initially used as a surname, believed to have emerged in the late 10th or early 11th century among the nobility of medieval Poland.
The name gained prominence due to its association with Saint Casimir, the patron saint of Poland, who lived from 1458 to 1484. Born as a prince of the Jagiellonian dynasty, he was known for his piety and commitment to celibacy, which contributed to the popularity of the name among devout Catholics.
One of the earliest recorded uses of the name Casimir can be found in the chronicles of Jan Długosz, a 15th-century Polish historian and author. Długosz's writings documented the life and legacy of Saint Casimir, further solidifying the name's significance in Polish culture.
Throughout history, several notable individuals have borne the name Casimir. Among them are Casimir III the Great (1310-1370), a renowned King of Poland who expanded the kingdom's territory and enacted important legal reforms. Casimir IV Jagiellon (1427-1492) was another influential Polish monarch who oversaw the country's Golden Age and the establishment of the Jagiellonian University.
In the realm of literature, Casimir Delavigne (1793-1843) was a French poet and playwright who gained recognition for his patriotic works during the Romantic era. Casimir Pulaski (1745-1779), a Polish nobleman and military leader, played a crucial role in the American Revolutionary War, earning him the title of "Father of the American Cavalry."
Another notable figure was Casimir Funk (1884-1967), a Polish-American biochemist credited with discovering vitamins and coining the term "vitamine" (later amended to "vitamin"). His groundbreaking research paved the way for our understanding of essential nutrients and their role in human health.
While the name Casimir has maintained its roots in Polish culture, it has also found its way into other languages and cultures, particularly in various European countries. However, its usage and popularity have fluctuated over time, reflecting cultural shifts and naming preferences.
Sourced from namecensus.com.
Popularity
Casimir over time
The chart below shows babies named Casimir registered in England and Wales in the years where the name appears in the published records, from 1997 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Casimir, the clearest high point is 2009. The latest England and Wales figure is 5 births in 2024, compared with 6 at the peak.
Babies born per year
Decades
Casimir by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Casimir was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.
| Decade | Average rank | Total births | Years covered |
|---|---|---|---|
| 2020s | #4279 | 15 | 4 |
| 2010s | #4279 | 11 | 3 |
| 2000s | #3262 | 10 | 2 |
| 1990s | #2859 | 3 | 1 |
Related
Names similar to Casimir
- Charlie 104,761
- Callum 65,796
- Connor 53,072
- Cameron 40,394
- Charles 33,091
- Christopher 26,849
- Caleb 15,553
- Corey 12,622
- Carter 11,505
- Cody 11,075
- Conor 10,298
- Christian 9,695
FAQ
Casimir: questions and answers
How popular is the name Casimir in the UK right now?
In 2024, Casimir was ranked #3688 for boys in England and Wales, with 5 births registered.
When was Casimir most popular?
The peak year on record was 2009, with 6 babies registered as Casimir in England and Wales.
What is the meaning and origin of Casimir?
A masculine name with Polish roots meaning "destroyer of peace".
How many people are called Casimir in the UK?
A total of 39 babies have been registered as Casimir across the 10 years of ONS England & Wales records shown here.
Which records is this page based on?
The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.