The Delaunay surname
In the 2010 U.S. Census, 250 people carried this name — #76,768 among all U.S. surnames, about 1 in every 1,250,000 people counted. That is up 21% from 206 in 2000.
What the name means
The meaning of the Delaunay surname
A surname transferred from the place name.
From de Launay.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Delaunay» (French), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In France’s civil register
France’s register of deaths holds 8,539 people named Delaunay.
56 of them were born outside France. Those born in France came from 88 départements, most often Seine-Maritime.
Where it concentrates, on the mapWhere they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Argentina’s national register
At least 58 people named Delaunay live in Argentina.
RENAPER only publishes a name in a province when more than ten people there share it, so the real number is higher. Most of them live in Buenos Aires Province.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In Switzerland’s population statistics
54 people named Delaunay live in Switzerland.
They live in 6 of Switzerland’s 26 cantons, most of all in Vaud.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Swiss Federal Statistical Office (FSO), «Surnames of the permanent resident population by canton», 2025, opendata.swiss/en/dataset/nachnamen-der-standigen-wohnbevolkerung-nach-kanton3 · names with fewer than 3 bearers in a canton are not published.
Who carried it
People named Delaunay,
with a public archive behind them.
-
Nicolas de Launay 1646–1727 · goldsmith -
Jean-Marie de Launay 1723–1800 · politician -
Joseph Delaunay 1752–1794 · politician -
Jacques Charles René Delaunay 1738–1825 · military officer
-
Jean-Pierre Viquesnel-Delaunay 1741–1804 · politician
-
Jacques François Marie Delaunay 1753–1832 · politician
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Delaunay.
- Delaroche 166 · U.S. census
- Delarue 163 · U.S. census
- Delassus 146 · U.S. census
- Delatour 257 · U.S. census
- Delatte 1,230 · U.S. census
- Delattre 249 · U.S. census
- Delaune 1,537 · U.S. census
- Delauney 157 · U.S. census
- Delaurier 280 · U.S. census
- Delavergne 302 · U.S. census
- Delay 3,616 · U.S. census
- Delbert 321 · U.S. census
When the index is not enough
This page says where Delaunay is.
A volume says what happened to it.
Every page in the index is free and stays free. The Heritage Volume is the long form: the full paper trail, the arms, the crossing — bound, and yours.