Mruz
surname · Latin script
/mɹuz/(machine-generated) pronunciation, model-generated
Mruz is a surname written in the Latin script, with more bearers in the United States than in any other country. Recorded meaning: From Polish mróz (“frost”).
- PLPoland1 in 628K(measured from records)
- CZCzechia1 in 1.3M
- USUnited States1 in 1.8M
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Mruz itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- 2 (measured from records)
- Sources
- 52 (measured from records)
- 1 in 628K (inferred from the name graph)
188 people, 2010
recorded for this name
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 Мруз in RU Russia, UA Ukraine.
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)
- Polishmróz“frost”(measured from records)
- Proto-Slavic*morzъ(inferred from the name graph)via mróz
Steps marked ◐ come from the entry for the form named above them, not from this name's own sources.
From Polish mróz (“frost”).
Sources 1
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Mruz 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 | |||
|---|---|---|---|---|---|
| US United States | 188 | 1 in 1.8M | 199 | Mruz | 11 |
| PL Poland | 61 | 1 in 628K | 34 | Mruz | 15 |
| RU Russia | ≈40 est. | ≈1 in 3.6M | — | Мруз | 52 |
| UA Ukraine | ≈40 est. | ≈1 in 1.1M | — | Мруз | 12 |
| CZ Czechia | 8 | 1 in 1.3M | 8 | Mruz | 2 |
188 people counted by Census Bureau — Surname Frequency 2010, 2010. 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: Census Bureau — Surname Frequency 2010; Census Bureau — Surname Frequency 2000; dane.gov.pl — PESEL living persons (surnames); MVČR — living population register 2017. 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)
Attested in 10 sources across 3 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| US United States | Census Bureau — Surname Frequency 2000 | 2000 | 199 | #86,992 |
| US United States | Census Bureau — Surname Frequency 2020 | 2020 | 192 | #100,469 |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 188 | #96,799 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 34 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 34 | #64,872 |
| PL Poland | dane.gov.pl — PESEL living persons (surnames) | 2026 | 27 | — |
| PL Poland | dane.gov.pl — PESEL living persons (names) | — | 27 | #74,835 |
| CZ Czechia | MVČR — living population register 2017 | — | 6 | #103,985 |
| CZ Czechia | KdeJsme.cz — četnost jmen a příjmení (MVČR population register front-end) | — | 5 | #21,211 |
| US United States | wru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.) | — | — | — |
Reference works 2
- 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
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 Mruz mean, and where does it come from?
- From Polish mróz (“frost”). Recorded by Wiktionary.
- How do you pronounce Mruz?
- A machine transcription gives /mɹuz/ (IPA) for English.
- In which country does Mruz have the most bearers?
- In the United States, the national register counted about 188 people named Mruz, more than in any other country we hold, where it is most often spelled mruz.
- Where is Mruz most common?
- Measured as a share of residents rather than as a count, Mruz is densest in Poland — about 1 in 628 thousand people — even though United States holds more of our records for it.
- How common is the name Mruz?
- In the United States, the national register counted 188 people named Mruz in 2010, about 1 in 1.8 million residents.
What do you want to know about Mruz?
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/mruzThe 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, “Mruz”. Data snapshot 2026-10-10.