The Guglielmo surname
In the 2010 U.S. Census, 2,078 people carried this name — #14,382 among all U.S. surnames, about 1 in every 142,900 people counted. That is up 3% from 2,008 in 2000.
In Argentina’s national register
At least 409 people named Guglielmo 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.
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 France’s civil register
France’s register of deaths holds 117 people named Guglielmo.
23 of them were born outside France. Those born in France came from 13 départements, most often Bouches-du-Rhône.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where they were born
Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.
In Switzerland’s population statistics
81 people named Guglielmo live in Switzerland.
They live in 8 of Switzerland’s 26 cantons, most of all in Aargau.
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.
Nearby in the index
Surnames next to Guglielmo.
- Gueye 1,274 · U.S. census
- Gugenheim 109 · U.S. census
- Guglielmetti 353 · U.S. census
- Guglielmi 817 · U.S. census
- Guglielmini 111 · U.S. census
- Guglielmino 235 · U.S. census
- Guhl 679 · U.S. census
- Gui 479 · U.S. census
- Guibert 163 · U.S. census
- Guichard 611 · U.S. census
- Guichet 115 · U.S. census
- Guida 2,974 · U.S. census
When the index is not enough
This page says where Guglielmo 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.