The Regazzi surname
In the 2010 U.S. Census, 189 people carried this name — #96,368 among all U.S. surnames, about 1 in every 1,666,700 people counted. That is up 25% from 151 in 2000.
In Switzerland’s population statistics
127 people named Regazzi live in Switzerland.
They live in 4 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 Argentina’s national register
At least 98 people named Regazzi 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.
Too few records to say where it concentrates region by region — these are plain counts, not shares.
Where 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 81 people named Regazzi.
7 of them were born outside France. Those born in France came from 15 départements, most often Paris.
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.
Who carried it
People named Regazzi,
with a public archive behind them.
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Pietro Regazzi 1838–1915 · lawyer
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Jean-René Regazzi 1929–1978 · criminal
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Roberto Regazzi 1956– · luthier
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Fabio Regazzi 1962– · politician
Wikidata (CC0).
Nearby in the index
Surnames next to Regazzi.
When the index is not enough
This page says where Regazzi 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.