Rosoux
surname · Latin script
Rosoux is a surname written in the Latin script, with more bearers in Switzerland than in any other country.
- USUnited States1 in 3Mas Roost(measured from records)
- BEBelgium1 in 82K
- EEEstonia≈1 in 13Kas Roost
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 Rosoux 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.
- Switzerland (measured from records)
- Sources
- 132 (measured from records)
- 1 in 82K (inferred from the name graph)
442 named Roost, 2024
Highest-authority source
Belgium
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Roost in US United States, CH Switzerland, BE Belgium and 2 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
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)
Rosoux 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 | |||
|---|---|---|---|---|---|
| CH Switzerland | 442as Roost | 1 in 19K | 442 | Roost | 20 |
| NL Netherlands | 263as Roost | 1 in 66K | 263 | Roost | 15 |
| BE Belgium | 143 | 1 in 82K | 143 | Roost | 51 |
| US United States | 110as Roost | 1 in 3M | 167 | Roost | 132 |
| DK Denmark | 107as Roost | 1 in 55K | 107 | — | 1 |
| EE Estonia | ≈91 est. | ≈1 in 13K | listed | Roost | 9 |
442 people counted by BFS — Familiennamen der Wohnbevölkerung (surnames), 2024. 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 2020; BFS — Familiennamen der Wohnbevölkerung (surnames); Familienaam.be — Belgian family-name frequency (population register); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); Danmarks Statistik — Hvor mange hedder...? (living-population name counts). 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).
Evidence(measured from records)
Attested in 1 sources across 1 country.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BE Belgium | Familienaam.be — Belgian family-name frequency (population register) | 2008 | 143 | #11,460 |
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- In which country does Rosoux have the most bearers?
- In Switzerland, the national register counted about 442 people named Roost, more than in any other country we hold.
- Where is Rosoux most common?
- Measured as a share of residents rather than as a count, Rosoux is densest in Belgium — about 1 in 82 thousand people — even though Switzerland holds more of our records for it.
- How common is the name Rosoux?
- In Belgium, the national register counted 143 people named Rosoux in 2008, about 1 in 82 thousand residents.
What do you want to know about Rosoux?
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/rosouxThe 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, “Rosoux”. Data snapshot 2026-10-10.