Caú
surname · Latin script
Caú is a surname written in the Latin script, with more bearers in Argentina than in any other country. Recorded meaning: Borrowed from Occitan. Historically most prevalent in Ariège.
- CHSwitzerland1 in 210K(measured from records)
- BEBelgium1 in 221K
- ARArgentina1 in 264K
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.
- Argentina (measured from records)
- Sources
- 57 (measured from records)
- 1 in 210K (inferred from the name graph)
172 people
Highest-authority source
Switzerland
measured from records inferred from the name graph
Spellings & scripts(measured from records)
Locally spelled Cáu in AR Argentina.
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)
Borrowed from Occitan. Historically most prevalent in Ariège.
Sources 2
- Wiktionary
- Dicionário dos sobrenomes italianos
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Caú 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 | |||
|---|---|---|---|---|---|
| AR Argentina | 172 | 1 in 264K | 172 | Cáu | 37 |
| ES Spain | 157 | 1 in 319K | 157 | Caú | 41 |
| US United States | 148 | 1 in 2.2M | 394 | — | 26 |
| BE Belgium | 53 | 1 in 221K | 53 | — | 3 |
| NL Netherlands | 43 | 1 in 402K | 43 | — | 3 |
| CH Switzerland | 40 | 1 in 210K | 40 | — | 3 |
| SE Sweden | 31 | 1 in 329K | 31 | — | 2 |
172 people counted by RENAPER — Apellidos (person counts, national), counting the spelling cau. 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 — First Name Frequency 2020 by sex; RENAPER — Apellidos (person counts, national); INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); Familienaam.be — Belgian family-name frequency (population register); CBG Familienamenbank — Dutch surname bearer counts (GBA/BRP 2007); BFS — Familiennamen der Wohnbevölkerung (surnames); Skatteverket — Sök hur många som har ett visst namn (living population). 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)
No register attests this spelling yet
Frequently asked questions
- What does the name Caú mean, and where does it come from?
- Borrowed from Occitan. Historically most prevalent in Ariège. Recorded by Wiktionary and Dicionário dos sobrenomes italianos.
- In which country does Caú have the most bearers?
- In Argentina, the national register counted about 172 people named Caú, more than in any other country we hold, where it is most often spelled cáu.
- Where is Caú most common?
- Measured as a share of residents rather than as a count, Caú is densest in Switzerland — about 1 in 210 thousand people — even though Argentina holds more of our records for it.
- How common is the name Caú?
- In Argentina, the national register counted 172 people named Caú, about 1 in 264 thousand residents.
What do you want to know about Caú?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl https://api.mondonomo.ai/api/v1/name-graph/ca%C3%BAThe same payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. Rate-limited for casual use; a free API key gives 1,000 requests a day, and bulk access is licensed separately.
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, “Caú”. Data snapshot 2026-10-10.