The Gagliardi surname
In the 2000 U.S. Census, 5,084 people carried this name — #6,197 among all U.S. surnames, about 1 in every 53,200 people counted.
In Argentina’s national register
At least 2,285 people named Gagliardi 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 442 people named Gagliardi.
148 of them were born outside France. Those born in France came from 36 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 Switzerland’s population statistics
375 people named Gagliardi live in Switzerland.
They live in 16 of Switzerland’s 26 cantons, most of all in Zurich.
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 · names with fewer than 3 bearers in a canton are not published.
In Belgium’s population register
At least 55 people named Gagliardi 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 Limburg.
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 Gagliardi.
- Gaeta 4,041 · U.S. census
- Gaetan 158 · U.S. census
- Gage 16,022 · U.S. census
- Gager 1,226 · U.S. census
- Gaggini 101 · U.S. census
- Gagliano 3,790 · U.S. census
- Gagliardo 986 · U.S. census
- Gaglio 795 · U.S. census
- Gaglione 645 · U.S. census
- Gagnard 332 · U.S. census
- Gagne 9,534 · U.S. census
- Gagner 1,534 · U.S. census
When the index is not enough
This page says where Gagliardi 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.