Kazimierz
given name · Latin script
Meaning: a male given name, equivalent to English Casimir
Recorded as a male name· opposite-gender records fall within measured source noise
/kaʑimjɛʂ/(machine-generated) pronunciation, model-generated
Kazimierz is a given name written in the Latin script, with more bearers in Poland than in any other country, where it is the 57th most common given name.
- PLPoland1 in 289(measured from records)
- GBUnited Kingdom≈1 in 109K
- USUnited States1 in 207K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Poland (measured from records)
- Sources
- 161 (measured from records)
- 1 in 289 (inferred from the name graph)
132,529 people, 2026
Highest-authority source
Poland
measured from records inferred from the name graph
Meaning & origin(measured from records)
a male given name, equivalent to English Casimir
Sources 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 13 languages in the etymology graph.
Where in the world(measured from records)
Kazimierz counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | ||||
|---|---|---|---|---|---|---|
| PL Poland | #57 | 132,529 | 1 in 289 | 138K | Kazimierz | 147 |
| CN China | — | ≈3,400 est. | ≈1 in 415K | — | Kazimierz | 4 |
| US United States | — | 1,608 | 1 in 207K | 1.6K | Kazimierz | 161 |
| GB United Kingdom | — | ≈600 est. | ≈1 in 109K | — | Kazimierz | 61 |
| SE Sweden | — | 507 | 1 in 20K | 507 | — | 11 |
| NO Norway | — | 230 | 1 in 24K | 702 | Kazimierz | 9 |
| LT Lithuania | — | ≈58 est. | ≈1 in 47K | — | Kazimierz | 10 |
| IS Iceland | — | 28 | 1 in 13K | 28 | — | — |
132,529 people counted by dane.gov.pl — PESEL given names (first + second name position, 2026-01-20), 2026. Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Registers cited: dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); dane.gov.pl — PESEL living persons (names); Census Bureau — First Name Frequency 2020 by sex; SSB PxWebApi — Persons/Last names by year (StatBank tables 10501/12891); SSB — Navnesøk (name-search service, living population); Skatteverket — Sök hur många som har ett visst namn (living population); Þjóðskrá Íslands — Name frequencies (NafnTíðni, registry). Figures without a register are Mondonomo estimates; see Methodology.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Other recorded senses(measured from records)
Kazimierz is also recorded in 3 other lexicons, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In Swedish, Se Kasimir.
as a nameFörnamn i Sverige. Kortfattat namnlexikon
In Polish, Casimir
as a namePolish Personal Names (CIA Foreign Names Studies, ch. 24)
Polish form of CASIMIR .
as a word
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Kazimierz I Odnowicielb. 1016PLPolish king (1016-1058)
- Kazimierz III Wielkib. 1310PLKing of Poland from 1333 to 1370
- Casimir IV Jagiellonb. 1427PLnot in their usual nameKing of Poland and Grand Duke of Lithuania
- Casimir Pulaskib. 1745USnot in their usual namePolish nobleman, general in the American Revolutionary War
- Kazimierz Funkb. 1884PLPolish-American biochemist
- Kazimierz Fajansb. 1887USPolish-American scientist
- Kazimierz Kuratowskib. 1896PLPolish mathematician (1896–1980)
- Zbigniew Brzezinskib. 1928USnot in their usual namePolish-American diplomat and political scientist (1928–2017)
- Kazimierz Deynab. 1947PLPolish footballer (1947–1989)
- Rafał Trzaskowskib. 1972PLnot in their usual namePolish politician, Mayor of Warsaw since 2018, presidential candidate for Poland in 2020 and 2025
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
How to address them(machine-generated)
A formal English salutation is built on the surname, so it needs a full name — on its own, a first name only supports the informal form.
Evidence(measured from records)
Attested in 37 sources across 17 countries.
Reference works 5
- Dictionary of American Family Names
- Wikipedia given-name tokens
- Wikidata name items (native-script + romanized given/family names)
- Rymut, Słownik nazwisk współcześnie w Polsce używanych (10 vols, IJP PAN, Kraków 1992–1994) — every Polish surname in the PESEL register at the end of 1990, with bearer counts nationally and per voivodeship1990
- Hoffman, Polish Surnames: Origins and Meanings (2nd ed., 2012)
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What are other forms of the name Kazimierz?
- In the etymology graph, Casimir, Kazimir and Kasimir are forms of the same name in other languages.
- What does the name Kazimierz mean, and where does it come from?
- a male given name, equivalent to English Casimir Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- How do you pronounce Kazimierz?
- A machine transcription gives /kaʑimjɛʂ/ (IPA) for Polish.
- In which country does Kazimierz have the most bearers?
- In Poland, the national register counted about 133 thousand people named Kazimierz, more than in any other country we hold, where it is most often spelled kazimierz.
- Where is Kazimierz most common?
- Kazimierz is densest in Poland, where the national register counts about 1 in 289 people carrying it.
- Is Kazimierz a male or female name?
- Kazimierz is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- How common is the name Kazimierz?
- In Poland, the national register counted 132,529 people named Kazimierz in 2026, about 1 in 289 residents.
- How common is Kazimierz compared with other names?
- In Poland, Kazimierz is the 57th most common given name of 25,969 given names recorded there.
What do you want to know about Kazimierz?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/kazimierzThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Kazimierz” — the 57th most common given name in Poland. Data snapshot 2026-10-10.