The Guillaume surname
In the 2010 U.S. Census, 3,230 people carried this name — #9,987 among all U.S. surnames, about 1 in every 91,700 people counted. That is up 32% from 2,451 in 2000.
In France’s civil register
France’s register of deaths holds 14,456 people named Guillaume.
351 of them were born outside France. Those born in France came from 102 départements, most often Paris.
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 Belgium’s population register
At least 3,406 people named Guillaume 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 Luxembourg Province.
Where it concentrates, on the mapWhere they live today
Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.
In Switzerland’s population statistics
484 people named Guillaume live in Switzerland.
They live in 10 of Switzerland’s 26 cantons, most of all in Vaud.
Where it concentrates, on the mapWhere 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.
In Argentina’s national register
At least 480 people named Guillaume 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 Entre Ríos.
Where it concentrates, on the mapWhere they live today
RENAPER (National Registry of Persons, Argentina), surnames of residents by province, December 2021 — CC BY 4.0.
In print
Guillaume in American newspapers,
1849–1959.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 12,951 pages in all carry the name.
Who carried it
People named Guillaume,
with a public archive behind them.
-
Henri-Louis-Gustave Guillaume 1812–1877 · politician -
Jean-Baptiste Claude Eugène Guillaume 1822–1905 · professor -
Edmond Guillaume 1826–1894 · architect -
Marie-Jeanne-Léonie Guillaume 1832–1905 · aristocrat -
Paul Guillaume 1842–1914 · priest
Wikidata and Wikimedia Commons (CC0) · 187 lives in all are documented under this name.
Nearby in the index
Surnames next to Guillaume.
- Guilbert 638 · U.S. census
- Guile 680 · U.S. census
- Guilherme 155 · U.S. census
- Guiliani 319 · U.S. census
- Guiliano 844 · U.S. census
- Guillard 204 · U.S. census
- Guille 192 · U.S. census
- Guillemette 1,065 · U.S. census
- Guillemin 108 · U.S. census
- Guillen 30,153 · U.S. census
- Guillermo 3,393 · U.S. census
- Guillet 568 · U.S. census
When the index is not enough
This page says where Guillaume 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.