Koś

surname · Latin script

Recorded as a female name· opposite-gender records fall within measured source noise

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

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

rarermore common
  • PLPoland1 in 5.2K(measured from records)
  • SISlovenia1 in 572
  • HRCroatia1 in 847

carrying the name, as counted by each country's national register. One hue, darker where it is more common; hover a country for its figure.

Poland (measured from records)

7,303 people, 2026

Sources
97 (measured from records)

Highest-authority source

1 in 572 (inferred from the name graph)

Slovenia

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 Kos in PL Poland, US United States, NL Netherlands.

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 kos (“blackbird”).

Sources 3

  • Dictionary of American Family Names
  • Wiktionary
  • Sunama Sarit (Hindi) Ten Thousand Sanskrit Names

Attested across 24 languages in the etymology graph.

Where in the world(measured from records)

Koś 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 Koś is recorded, by country
CountryMost common spellingSources
PL Poland#6397,3031 in 5.2K3.7KKos97
HR Croatia—4,9911 in 8475K——
SI Slovenia—3,6761 in 5723.7K—3
CZ Czechia—1,8841 in 5.7K1.9K——
US United States—1,6691 in 199K1.7KKos62
NL Netherlands—1,4761 in 12K1.5KKos4

7,303 people counted by dane.gov.pl — PESEL living persons (surnames), 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: DZS — Imena i prezimena (per-token lookup form); dane.gov.pl — PESEL living persons (surnames); stat.si Imena rojstva — full name register (per-token frequency + rank); MVČR — living population register 2017; naše jména — 2016 MVČR snapshot; Census Bureau — Surname Frequency 2010; CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007). 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)

Koś is also recorded as 2 other names, grouped separately because the records behind them do not connect to the one described above.

  • English surname23 spellings in the group

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

    Languages: English, German, Dutch

    Also written Kos, Koes, Kös, Koş, Köş

  • Ukrainian surname40 spellings in the group

    Most recorded in Ukraine, Russia, Kazakhstan, Poland

    Languages: Ukrainian, Russian, Polish

    Also written Кос, Kos, Косс, Коос, Koss

2 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.

How to address them(machine-generated)

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

Evidence(measured from records)

Attested in 5 sources across 2 countries.

Official registers attesting Koś
CountryRegisterYearCountRank
PL Polanddane.gov.pl — PESEL living persons (surnames)2026220—
PL Polanddane.gov.pl — PESEL living persons (names)—220#15,026
PL Polanddane.gov.pl — PESEL living persons (surnames)2026205—
PL Polanddane.gov.pl — PESEL living persons (names)—205#15,792
CZ CzechiaMVČR — living population register 2017—6#103,702

Reference works 2

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 Koś mean, and where does it come from?
From kos (“blackbird”). Recorded by Dictionary of American Family Names and Wiktionary and 1 other source.
How do you pronounce Koś?
A machine transcription gives /kɔɕ/ (IPA) for Polish.
In which country does Koś have the most bearers?
In Poland, the national register counted about 7.3 thousand people named Koś, more than in any other country we hold, where it is most often spelled kos.
Where is Koś most common?
Measured as a share of residents rather than as a count, Koś is densest in Slovenia — about 1 in 572 people — even though Poland holds more of our records for it.
How common is the name Koś?
In Poland, the national register counted 7,303 people named Koś in 2026, about 1 in 5.2 thousand residents.
How common is Koś compared with other names?
In Poland, Koś is the 639th most common surname of 240,840 surnames recorded there.

What do you want to know about Koś?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

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Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/ko%C5%9B

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, “Koś” — the 639th most common surname in Poland. Data snapshot 2026-10-10.

See how Koś parses inside a full name →