Kaczyński
surname · Latin script
(measured from records)Officially recorded in 3 countries · latest register: dane.gov.pl, 2026
/kaˈt͡ʂɘɲ.ski/(recorded in a dictionary) Polish · from Wiktionary
Kaczyński is a surname written in the Latin script, with more bearers in Poland than in any other country: 5,842 people, counted by dane.gov.pl in 2026. Recorded meaning: From kaczka (“duck”).
- PLPoland1 in 6.6K(measured from records)
- NONorway1 in 238K
- USUnited States1 in 242K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Countries with no figure are shown too: flat where a national register lists the name without counting it, hatched where only our records hold it. One hue, darker where it is more common; hover a country for its figure.
- Poland (measured from records)
- Record sources
- 87 (measured from records)
- 1 in 6.6K (inferred from the name graph)
5,842 people, 2026
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Poland
measured from records inferred from the name graph
Spellings & scripts
(measured from records)One other spelling is counted as the same name:
Locally spelled Kaczynski in PL Poland, US United States, GB United Kingdom and 3 more.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
How to pronounce Kaczyński
- Polish:/kaˈt͡ʂɘɲ.ski/(recorded in a dictionary) from Wiktionary
Meaning & origin
(measured from records)From kaczka (“duck”).
Cited for this meaning 1
Attested across 14 languages in the etymology graph.
Where the surname Kaczyński is found
(measured from records)Kaczyński 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 | #633 | 5,842 | 1 in 6.6K | 5.8K | Kaczynski | 76 |
| US United States | — | 1,377 | 1 in 242K | 1.4K | Kaczynski | 87 |
| GB United Kingdom | — | ≈260 est. | ≈1 in 269K | — | Kaczynski | 24 |
| CA Canada | — | ≈130 est. | ≈1 in 322K | — | Kaczynski | 10 |
| FR France | — | ≈110 est. | ≈1 in 607K | 20 | Kaczyński | 2 |
| IE Ireland | — | ≈65 est. | ≈1 in 83K | — | Kaczynski | 2 |
| NO Norway | — | 23 | 1 in 238K | 23 | Kaczynski | 2 |
| FI Finland | — | 21 | 1 in 265K | 21 | — | 1 |
5,842 people counted by dane.gov.pl — PESEL living persons (surnames), 2026, counting the spelling kaczyński. 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 living persons (surnames); Census Bureau — Surname Frequency 2010; SSB — Navnesøk (name-search service, living population); DVV — Nimipalvelu (Finnish name service, per-name lookup); INSEE — Fichier des noms de famille (1891–2000). 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).
Notable people with this name
(measured from records)- Rajmund Kaczyńskib. 1922PLPolish engineer (1922–2005)
- Lech Kaczyńskib. 1949PLPolish politician, democratic oppositionist, ministry of justice, president of Poland (1949–2010)
- Jarosław Kaczyńskib. 1949PL13th Prime Minister of the Republic of Poland
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)Evidence
(measured from records)9 registers and reference works attest this spelling, across 3 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Kaczyński mean, and where does it come from?
- From kaczka (“duck”). Recorded by Wiktionary.
- How do you pronounce Kaczyński?
- In Polish /kaˈt͡ʂɘɲ.ski/ (Wiktionary).
- Which countries have the most people with the surname Kaczyński?
- In Poland, the national register counted about 5.8 thousand people named Kaczyński, more than in any other country we hold, where it is most often spelled kaczynski. After it come United States, United Kingdom, Canada and France; the country table on this page ranks them.
- Where is Kaczyński most common?
- Kaczyński is densest in Poland, where the national register counts about 1 in 6.6 thousand people carrying it.
- How common is the name Kaczyński?
- In Poland, the national register counted 5,842 people named Kaczyński in 2026, about 1 in 6.6 thousand residents.
- How common is Kaczyński compared with other names?
- In Poland, Kaczyński is the 633rd most common surname of 240,840 surnames recorded there.
What do you want to know about Kaczyński?
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/kaczy%C5%84skiThe 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, “Kaczyński” — ranked 314th in Poland (dane.gov.pl, 2026). Data snapshot 2026-10-13.