The Guerreiro surname
In the 2010 U.S. Census, 508 people carried this name — #42,640 among all U.S. surnames, about 1 in every 588,200 people counted. That is up 16% from 438 in 2000.
In Argentina’s national register
At least 921 people named Guerreiro 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 Switzerland’s population statistics
682 people named Guerreiro live in Switzerland.
They live in 20 of Switzerland’s 26 cantons, most of all in Vaud.
Where it concentrates, on the mapWhere 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 France’s civil register
France’s register of deaths holds 299 people named Guerreiro.
Most of them — 178 — were born outside France. Those born in France came from 35 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 Guerreiro,
with a public archive behind them.
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José António Guerreiro 1789–1834 · judge -
Anita Guerreiro 1936–2025 · actor -
Antonio Guerreiro d. 1981 · coppersmith
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Miguel do Couto Guerreiro 1720–1793 · writer
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Viúva Guerreiro 1858–1936 · composer
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Manuel de Medeiros Guerreiro 1891–1978 · Catholic priest
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Guerreiro.
- Guerber 113 · U.S. census
- Guerci 132 · U.S. census
- Guerin 6,291 · U.S. census
- Guerini 102 · U.S. census
- Guerra 70,071 · U.S. census
- Guerre 251 · U.S. census
- Guerrero 128,677 · U.S. census
- Guerri 114 · U.S. census
- Guerrier 3,372 · U.S. census
- Guerrieri 999 · U.S. census
- Guerriero 2,734 · U.S. census
- Guerrin 123 · U.S. census
When the index is not enough
This page says where Guerreiro 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.