The Berthelot surname
In the 2010 U.S. Census, 1,474 people carried this name — #18,660 among all U.S. surnames, about 1 in every 200,000 people counted. That is up 7% from 1,381 in 2000.
In France’s civil register
France’s register of deaths holds 7,503 people named Berthelot.
63 of them were born outside France. Those born in France came from 89 départements, most often Ille-et-Vilaine.
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 55 people named Berthelot 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
26 people named Berthelot live in Switzerland.
They live in 4 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 · names with fewer than 3 bearers in a canton are not published.
In Belgium’s population register
At least 22 people named Berthelot 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 Brussels-Capital.
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 Berthelot.
- Bertel 291 · U.S. census
- Bertelli 388 · U.S. census
- Berten 110 · U.S. census
- Bertero 184 · U.S. census
- Berth 238 · U.S. census
- Berthel 247 · U.S. census
- Berthold 1,578 · U.S. census
- Berthoud 130 · U.S. census
- Berti 1,173 · U.S. census
- Bertin 1,136 · U.S. census
- Bertini 721 · U.S. census
- Bertino 1,044 · U.S. census
When the index is not enough
This page says where Berthelot 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.