The Petrocchi surname
In the 2000 U.S. Census, 104 people carried this name — #146,011 among all U.S. surnames, about 1 in every 2,500,000 people counted.
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In Switzerland’s population statistics
79 people named Petrocchi 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 · names with fewer than 3 bearers in a canton are not published.
In France’s civil register
France’s register of deaths holds 50 people named Petrocchi.
11 of them were born outside France. Those born in France came from 11 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.
Nearby in the index
Surnames next to Petrocchi.
- Petri 2,885 · U.S. census
- Petrilli 759 · U.S. census
- Petrillo 3,930 · U.S. census
- Petrini 826 · U.S. census
- Petris 198 · U.S. census
- Petro 5,840 · U.S. census
- Petroff 1,964 · U.S. census
- Petron 537 · U.S. census
- Petrone 3,729 · U.S. census
- Petroni 423 · U.S. census
- Petronio 408 · U.S. census
- Petrou 365 · U.S. census
When the index is not enough
This page says where Petrocchi 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.