The Giannoni surname
In the 2010 U.S. Census, 201 people carried this name — #91,625 among all U.S. surnames, about 1 in every 1,428,600 people counted. That is down 37% from 317 in 2000.
In Argentina’s national register
At least 630 people named Giannoni 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 256 people named Giannoni.
57 of them were born outside France. Those born in France came from 24 départements, most often Corsica.
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
40 people named Giannoni live in Switzerland.
They live in 3 of Switzerland’s 26 cantons, most of all in Ticino.
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.
In print
Giannoni in American newspapers,
1929.
Chronicling America, Library of Congress — digitised newspapers in the public domain · 210 pages in all carry the name.
Nearby in the index
Surnames next to Giannoni.
- Gianini 124 · U.S. census
- Giannelli 893 · U.S. census
- Giannetti 1,120 · U.S. census
- Gianni 988 · U.S. census
- Giannini 3,499 · U.S. census
- Giannone 1,733 · U.S. census
- Giannotti 1,008 · U.S. census
- Gianola 184 · U.S. census
- Gianoli 145 · U.S. census
- Gianotti 469 · U.S. census
- Giard 639 · U.S. census
- Giardina 3,565 · U.S. census
When the index is not enough
This page says where Giannoni 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.