The Mastrosimone surname
In the 2010 U.S. Census, 258 people carried this name — #74,826 among all U.S. surnames, about 1 in every 1,111,100 people counted. That is up 14% from 227 in 2000.
In Argentina’s national register
At least 106 people named Mastrosimone 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 Córdoba.
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 58 people named Mastrosimone.
Most of them — 40 — were born outside France. Those born in France came from 8 départements, most often Allier.
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 Belgium’s population register
At least 25 people named Mastrosimone 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 Hainaut.
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.
Who carried it
People named Mastrosimone,
with a public archive behind them.
-
William Mastrosimone 1947– · screenwriter
Wikidata (CC0).
Nearby in the index
Surnames next to Mastrosimone.
- Mast 15,932 · U.S. census
- Mastalerz 254 · U.S. census
- Mastin 4,085 · U.S. census
- Maston 1,878 · U.S. census
- Mastrangelo 2,482 · U.S. census
- Mastroianni 1,977 · U.S. census
- Masure 137 · U.S. census
- Mat 258 · U.S. census
- Mata 48,120 · U.S. census
- Matalon 420 · U.S. census
- Matarese 712 · U.S. census
- Matas 934 · U.S. census
When the index is not enough
This page says where Mastrosimone 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.