The Castagnoli surname
In the 2010 U.S. Census, 137 people carried this name — #125,282 among all U.S. surnames, about 1 in every 2,000,000 people counted. That is up 17% from 117 in 2000.
Where the name comes from
The origin of the Castagnoli surname
A surname, Castagnoli, from Italian.
Borrowed from Italian Castagnoli.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Castagnoli» (French), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Argentina’s national register
At least 187 people named Castagnoli 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 105 people named Castagnoli.
29 of them were born outside France. Those born in France came from 13 départements, most often Corsica.
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
25 people named Castagnoli live in Switzerland.
They live in 5 of Switzerland’s 26 cantons, most of all in Lucerne.
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 Castagnoli.
- Casson 2,056 · U.S. census
- Cassuto 113 · U.S. census
- Casta 204 · U.S. census
- Castagna 2,121 · U.S. census
- Castagne 119 · U.S. census
- Castagno 433 · U.S. census
- Castaing 226 · U.S. census
- Castaldi 809 · U.S. census
- Castaldo 2,222 · U.S. census
- Castan 226 · U.S. census
- Castaner 203 · U.S. census
- Castanheira 193 · U.S. census
When the index is not enough
This page says where Castagnoli 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.