Kaczyński

surname · Latin script

/kat͡ʂɨɲskʲi/(machine-generated) pronunciation, model-generated

Kaczyński is a surname written in the Latin script, with more bearers in Poland than in any other country. Recorded meaning: From kaczka (“duck”).

rarermore common
  • PLPoland1 in 6.6K(measured from records)
  • IEIreland≈1 in 82K
  • NONorway1 in 238K

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)

5,842 people, 2026

Sources
87 (measured from records)

Highest-authority source

1 in 6.6K (inferred from the name graph)

Poland

measured from records inferred from the name graph

Name dossier (print, CSV)

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.

Meaning & origin(measured from records)

From kaczka (“duck”).

Sources 1

Attested across 14 languages in the etymology graph.

Where in the world(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.

Where Kaczyński is recorded, by country
CountryMost common spellingSources
PL Poland#6335,8421 in 6.6K5.8KKaczynski76
US United States—1,3771 in 242K1.4KKaczynski87
EG Egypt—≈280 est.≈1 in 378K—Kaczynski2
GB United Kingdom—≈250 est.≈1 in 261K—Kaczynski24
FR France—≈120 est.≈1 in 548K20Kaczyński2
IE Ireland—≈63 est.≈1 in 82K—Kaczynski2
NO Norway—231 in 238K23Kaczynski2

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); 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).

Other names spelled this way(inferred from the name graph)

Kaczyński is also recorded as 3 other names, grouped separately because the records behind them do not connect to the one described above.

  • English surname4 spellings in the group

    Most recorded in United States, United Kingdom, Germany, Australia

    Languages: English, German

    Also written Kaczynski

  • a separate name2 spellings in the group

    Also written Kaczynski

  • Hindi surname4 spellings in the group

    Most recorded in United States

    Also written Kaczynski

16 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Notable people with this name(measured from records)

1850190019502000Wincenty Kaczyński, b. 1870Antoni Kaczyński, b. 1874Wiktoryn Kaczyński, b. 1891Rajmund Kaczyński, b. 1922Bogusław Kaczyński, b. 1942Lech Kaczyński, b. 1949Jarosław Kaczyński, b. 1949Marek Kaczyński, b. 1963Przemysław Kaczyński, b. 1972Filip Kaczyński, b. 1987

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)

FormalSzanowni Państwo,Dear Kaczyński, (English)
InformalSzanowni Państwo,Hello, (English)

Evidence(measured from records)

Attested in 9 sources across 3 countries.

Official registers attesting Kaczyński
CountryRegisterYearCountRank
PL Polanddane.gov.pl — PESEL living persons (surnames)20265.8K—
PL Polanddane.gov.pl — PESEL living persons (names)—5.8K#314
PL Polanddane.gov.pl — PESEL living persons (surnames)202641—
PL Polanddane.gov.pl — PESEL living persons (names)—41#57,279

Reference works 5

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 does the name Kaczyński mean, and where does it come from?
From kaczka (“duck”). Recorded by Wiktionary.
How do you pronounce Kaczyński?
A machine transcription gives /kat͡ʂɨɲskʲi/ (IPA) for Polish.
In which country does Kaczyński have the most bearers?
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.
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.

Please leave out anyone's personal details (see Privacy).

Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/kaczy%C5%84ski

The 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” — the 633rd most common surname in Poland. Data snapshot 2026-10-10.

See how Kaczyński parses inside a full name →