Siwy
surname · Latin script
Meaning: grey, grey-haired (kaikki.org Wiktionary extract (IPA + transliterations))
(measured from records)Officially recorded in 7 countries · latest register: dane.gov.pl, 2026
/ɕivɨ/(machine-generated) Polish · model-generated · uncertain
Siwy is a surname written in the Latin script, with more bearers in Poland than in any other country: 1,984 people, counted by dane.gov.pl in 2026.
- PLPoland1 in 19K(measured from records)
- CZCzechia1 in 228K
- USUnited States1 in 1.5M
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
- 69 (measured from records)
- 1 in 19K (inferred from the name graph)
1,984 people, 2026
corpus datasets behind its best-documented spelling
strongest: highest-authority source
Poland
measured from records inferred from the name graph
How to pronounce Siwy
- Polish:/ɕivɨ/(machine-generated) model-generated
- Indonesian:/siwj/(machine-generated) model-generated
Readings marked model-generated were transcribed by a model; the others are quoted from the dictionary named.
Meaning & origin
(measured from records)grey, grey-haired
Cited for this meaning 1
- kaikki.org Wiktionary extract (IPA + transliterations)
Attested across 2 languages in the etymology graph.
Where the surname Siwy is found
(measured from records)Siwy 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 | 1,984 | 1 in 19K | 1.2K | Siwy | 69 |
| US United States | 227 | 1 in 1.5M | 236 | Siwy | 54 |
| CZ Czechia | 47 | 1 in 228K | 47 | Siwy | 8 |
| GB United Kingdom | ≈45 est. | ≈1 in 1.5M | 10 | Siwy | 12 |
| NL Netherlands | ≈22 est. | ≈1 in 823K | — | Siwy | 3 |
1,984 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); Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2020; MVČR — living population register 2017; Surnames of England and Wales (taliesin-arlein.net, Sept 2002 electoral register). 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)- André Siwyb. 1941BEBelgian violinist
- Zuzanna Siwyb. 1972PLPolish–American chemist
- Anna Siwy-HudowskaPLPolish psychologist
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)16 registers and reference works attest this spelling, across 7 countries.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- What does the name Siwy mean, and where does it come from?
- grey, grey-haired Recorded by kaikki.org Wiktionary extract (IPA + transliterations).
- How do you pronounce Siwy?
- It depends on the language: in Polish /ɕivɨ/; in Indonesian /siwj/. Transcriptions are machine-generated except where a dictionary is named.
- Which countries have the most people with the surname Siwy?
- In Poland, the national register counted about 2.0 thousand people named Siwy, more than in any other country we hold, where it is most often spelled siwy. After it come United States, Czechia, United Kingdom and Netherlands; the country table on this page ranks them.
- Where is Siwy most common?
- Siwy is densest in Poland, where the national register counts about 1 in 19 thousand people carrying it.
- How common is the name Siwy?
- In Poland, the national register counted 1,984 people named Siwy in 2026, about 1 in 19 thousand residents.
What do you want to know about Siwy?
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/siwyThe 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, “Siwy” — ranked 2588th in Poland (dane.gov.pl, 2026). Data snapshot 2026-10-13.