The Tommasi surname
In the 2010 U.S. Census, 279 people carried this name — #70,208 among all U.S. surnames, about 1 in every 1,111,100 people counted. That is up 9% from 256 in 2000.
What the name means
The meaning of the Tommasi surname
A surname originating as a patronymic.
From the personal name Tommaso.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Tommasi» (Italian), 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 829 people named Tommasi 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 182 people named Tommasi.
63 of them were born outside France. Those born in France came from 30 départements, most often Bouches-du-Rhône.
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
103 people named Tommasi live in Switzerland.
They live in 11 of Switzerland’s 26 cantons, most of all in Zurich.
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 Belgium’s population register
At least 34 people named Tommasi 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 Tommasi,
with a public archive behind them.
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Vibiano Tommasi 1200–1185 · Catholic priest
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Vibiano Tommasi 1200–1184 · Catholic priest
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Giugurta Tommasi 1562–1607 · historian
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Brandimarte Tommasi 1591–1648 · Catholic priest
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Antonio Tommasi 1658–1735 · regular cleric
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Donato Tommasi 1761–1831 · politician
Wikidata (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Tommasi.
- Tomczak 2,566 · U.S. census
- Tomczyk 1,312 · U.S. census
- Tome 2,007 · U.S. census
- Tomei 1,045 · U.S. census
- Tomi 111 · U.S. census
- Tomic 726 · U.S. census
- Tommasini 143 · U.S. census
- Tommasino 158 · U.S. census
- Ton 4,667 · U.S. census
- Tonarelli 121 · U.S. census
- Tonda 159 · U.S. census
- Tondini 107 · U.S. census
When the index is not enough
This page says where Tommasi 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.