The Defrance surname
In the 2010 U.S. Census, 785 people carried this name — #29,918 among all U.S. surnames, about 1 in every 370,400 people counted. That is down 5% from 826 in 2000.
In France’s civil register
France’s register of deaths holds 2,307 people named Defrance.
24 of them were born outside France. Those born in France came from 78 départements, most often Pas-de-Calais.
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 98 people named Defrance 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 Belgium’s population register
At least 54 people named Defrance live in Belgium.
Statbel only publishes a name in a municipality when five or more people there share it, so the real number is higher. Most of them live in Hainaut.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
Nearby in the index
Surnames next to Defrance.
- Defilippi 206 · U.S. census
- Defoor 1,320 · U.S. census
- Deforge 1,105 · U.S. census
- Defosse 289 · U.S. census
- Defour 243 · U.S. census
- Defrain 504 · U.S. census
- Dega 118 · U.S. census
- Degan 687 · U.S. census
- Degand 290 · U.S. census
- Degano 103 · U.S. census
- Dege 209 · U.S. census
- Degen 1,997 · U.S. census
When the index is not enough
This page says where Defrance 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.