Dufau

surname · Latin script

Recorded for both men and women· direction only, no split published

Dufau is a surname written in the Latin script, with more bearers in Argentina than in any other country.

rarermore common
  • ARArgentina1 in 113K(measured from records)
  • UYUruguay1 in 17K
  • CHSwitzerland1 in 1.2M

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)

401 people

Sources
45 (measured from records)

Highest-authority source

1 in 17K (inferred from the name graph)

Uruguay

measured from records inferred from the name graph

Name dossier (print, CSV)

Meaning & origin

No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.

Where in the world(measured from records)

Dufau 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.

Where Dufau is recorded, by country
CountryMost common spellingSources
AR Argentina4011 in 113K401Dufau45
UY Uruguay2011 in 17K201Dufau12
US United States1061 in 3.1M106Dufau20
BR Brazil851 in 2.5M85Dufau33
ES Spain311 in 1.6M31Dufau11
CH Switzerland71 in 1.2M7—1

401 people counted by RENAPER — Apellidos (person counts, national). 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: RENAPER — Apellidos (person counts, national); INE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public); IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname); Census Bureau — Surname Frequency 2010; INE — Padrón per-token widgets (current living counts, given + apellidos); INE — Apellidos más frecuentes (Padrón Municipal); BFS — Familiennamen der Wohnbevölkerung (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).

Other names spelled this way(inferred from the name graph)

Dufau is also recorded as another name, grouped separately because the records behind them do not connect to the one described above.

  • Russian surname7 spellings in the group

    Most recorded in Russia, United States, Canada

    Languages: Russian, Ukrainian

    Also written Dufault, Дюфо, Dufaux

27 further groups record this spelling and are not listed here.

Grouping is the name graph's, not a register's: two spellings join a group when the evidence links them, so a group is a claim about the records rather than about the people.

Notable people with this name(measured from records)

1700180019002000Fortuné Dufau, b. 1770Pierre-Armand Dufau, b. 1795Clémentine-Hélène Dufau, b. 1869Paul Dufau, b. 1898André Dufau, b. 1905Pierre Dufau, b. 1908Graciela Dufau, b. 1942Jean-Pierre Dufau, b. 1943Sophie Dufau, b. 1960Loïc Dufau, b. 1989

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).

Evidence(measured from records)

Attested in 14 sources across 8 countries.

Official registers attesting Dufau
CountryRegisterYearCountRank
AR ArgentinaRENAPER — Apellidos (person counts, national)—401—
UY UruguayINE Uruguay — Apellidos más frecuentes 1902–2024 (Tableau Public)—201—
US United StatesCensus Bureau — Surname Frequency 20102010106#153,769
US United StatesCensus Bureau — Surname Frequency 20202020102#154,755
BR BrazilIBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname)—85#71,518
ES SpainINE — Apellidos más frecuentes (Padrón Municipal)—31#62,230
ES SpainINE — Padrón per-token widgets (current living counts, given + apellidos)—31#61,483
CH SwitzerlandBFS — Familiennamen der Wohnbevölkerung (surnames)20247#79,838
US United Stateswru Name Dictionary — US surnames, Census 2010 subset (Khanna et al.)———

Reference works 3

  • Wikipedia surname tokens
  • Wikidata name items (native-script + romanized given/family names)
  • jeantosti.com — Dictionnaire des noms de famille de France et d'ailleurs (Jean Tosti)

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

In which country does Dufau have the most bearers?
In Argentina, the national register counted about 401 people named Dufau, more than in any other country we hold, where it is most often spelled dufau.
Where is Dufau most common?
Measured as a share of residents rather than as a count, Dufau is densest in Uruguay — about 1 in 17 thousand people — even though Argentina holds more of our records for it.
How common is the name Dufau?
In Argentina, the national register counted 401 people named Dufau, about 1 in 113 thousand residents.

What do you want to know about Dufau?

Nobody replies to these one by one, but what readers ask decides what these pages answer next.

Please leave out anyone's personal details (see Privacy).

Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/dufau

The same 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), 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, “Dufau”. Data snapshot 2026-10-10.

See how Dufau parses inside a full name →