Delaunay
surname · Latin script
Meaning: De Launay ou de L’Aunay, noms de plusieurs localités du nord de la France
Recorded for both men and women· direction only, no split published
/dəlonɛ/(machine-generated) pronunciation, model-generated
Delaunay is a surname written in the Latin script, with more bearers in France than in any other country.
- FRFrance≈1 in 4.5K(inferred from the name graph)
- DZAlgeria≈1 in 105K
- CHSwitzerland1 in 156K
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.
- France (inferred from the name graph)
- Sources
- 292 (measured from records)
- ≈1 in 4.5K (inferred from the name graph)
≈15,000 people, est.
Highest-authority source
France, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
De Launay ou de L’Aunay, noms de plusieurs localités du nord de la France.
Sources 1
- Dictionnaire des noms de famille du Canada français. Anthroponymie et généalogie. 2e édition
Where in the world(measured from records)
Delaunay 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 | ||||
|---|---|---|---|---|---|---|
| FR France | #198 | ≈15,000 est. | ≈1 in 4.5K | 2.1K | Delaunay | 292 |
| DZ Algeria | — | ≈410 est. | ≈1 in 105K | — | Delaunay | 1 |
| US United States | — | 250 | 1 in 1.3M | 250 | Delaunay | 131 |
| EG Egypt | — | ≈110 est. | ≈1 in 946K | — | Delaunay | 2 |
| NL Netherlands | — | ≈110 est. | ≈1 in 165K | — | Delaunay | 5 |
| CH Switzerland | — | 54 | 1 in 156K | 54 | Delaunay | 13 |
| BE Belgium | — | 53 | 1 in 221K | 53 | Delaunay | 17 |
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: INSEE — Fichier des noms de famille (1891–2000); Census Bureau — Surname Frequency 2010; BFS — Familiennamen der Wohnbevölkerung (surnames); Familienaam.be — Belgian family-name frequency (population 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).
Other recorded senses(measured from records)
Delaunay is also recorded in one other lexicon, as a different name or as an ordinary word. These are senses of the spelling, not of the name above.
In English, Robert, French painter
as a namePronouncing Dictionary of Proper Names
Ordered by how much of this spelling's record each language holds, so a sense from a language the name is barely used in sits last rather than first.
Notable people with this name(measured from records)
- Joseph Delaunayb. 1752FRFrench politician (1752-1794)
- Charles-Eugène Delaunayb. 1816FRFrench astronomer and mathematician (1816-1872)
- Jules-Élie Delaunayb. 1828FRFrench painter (1828-1891)
- Henri Delaunayb. 1883FRFrench football administrator (1883-1955)
- Sonia Delaunay-Terkb. 1885FRFrench painter (1885–1979)
- Robert Delaunayb. 1885FRFrench painter (1885–1941)
- Boris Delaunayb. 1890RUSoviet mathematician (1890–1980)
- Charles Delaunayb. 1911FRFrench author, jazz expert (1911-1988)
- Michèle Delaunayb. 1947FRFrench politician
- Liza del Sierrab. 1985FRnot in their usual nameFrench pornographic actress
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)
Attested in 23 sources across 13 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1961 | 2.7K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1951 | 2.6K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1971 | 2.4K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1941 | 2.3K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1981 | 2.2K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1991 | 2.1K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1931 | 1.9K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1921 | 1.9K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1901 | 1.4K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1911 | 1.4K | — |
| FR France | INSEE — Fichier des noms de famille (1891–2000) | 1891 | 838 | — |
| US United States | Census Bureau — Surname Frequency 2010 | 2010 | 250 | #76,768 |
Reference works 5
- Nederlandse FamilienamenBank (Dutch surname bank; ex-Meertens Instituut, now CBG)2007
- Wikipedia surname tokens
- 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
- 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
- How do you pronounce Delaunay?
- A machine transcription gives /dəlonɛ/ (IPA) for French.
- What does the name Delaunay mean?
- Recorded meaning: De Launay ou de L’Aunay, noms de plusieurs localités du nord de la France.
- In which country does Delaunay have the most bearers?
- Mondonomo estimates about 15 thousand people named Delaunay in France, more than in any other country we hold, where it is most often spelled delaunay.
- How common is the name Delaunay?
- In the United States, the national register counted 250 people named Delaunay in 2010, about 1 in 1.3 million residents.
- How common is Delaunay compared with other names?
- In France, Delaunay is the 198th most common surname of 1,200,812 surnames recorded there.
What do you want to know about Delaunay?
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/delaunayThe 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, “Delaunay” — the 198th most common surname in France. Data snapshot 2026-10-10.