Siewior
surname · Latin script
(measured from records)Officially recorded in 1 country · latest register: dane.gov.pl, 2026
/ɕɛvʲɔr/(machine-generated) Polish · model-generated
Siewior is a surname written in the Latin script, with more bearers in Poland than in any other country.
- PLPoland1 in 94K(measured from records)
- GBUnited Kingdom≈1 in 26Mfew records
- USUnited States≈1 in 46Mfew records
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)
- Record sources
- 30 (measured from records)
- 1 in 94K (inferred from the name graph)
406 people, 2026
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Poland
measured from records inferred from the name graph
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Attested in 1 language in the etymology graph.
Where in the world
(measured from records)Siewior 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 | 406 | 1 in 94K | 212 | Siewior | 30 |
| US United States | ≈7 est. | ≈1 in 46M | — | Siewior | 22 |
| GB United Kingdom | ≈3 est. | ≈1 in 26M | — | Siewior | 7 |
406 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: dane.gov.pl — PESEL living persons (surnames). 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).
How to address them
(machine-generated)Evidence
(measured from records)5 registers and reference works attest this spelling, across 1 country.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 212 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 212 | #15,579 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 194 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 194 | #16,685 |
Reference works 3
- 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
- How do you pronounce Siewior?
- In Polish /ɕɛvʲɔr/. Transcriptions are machine-generated except where a dictionary is named.
- In which country does Siewior have the most bearers?
- In Poland, the national register counted about 406 people named Siewior, more than in any other country we hold, where it is most often spelled siewior.
- Where is Siewior most common?
- Siewior is densest in Poland, where the national register counts about 1 in 94 thousand people carrying it.
- How common is the name Siewior?
- In Poland, the national register counted 406 people named Siewior in 2026, about 1 in 94 thousand residents.
What do you want to know about Siewior?
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/siewiorThe 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, “Siewior”. Data snapshot 2026-10-13.