The Allegro surname
In the 2010 U.S. Census, 493 people carried this name — #43,732 among all U.S. surnames, about 1 in every 588,200 people counted. That is up 7% from 462 in 2000.
In Argentina’s national register
At least 120 people named Allegro 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 Belgium’s population register
At least 98 people named Allegro 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.
In France’s civil register
France’s register of deaths holds 87 people named Allegro.
Most of them — 64 — were born outside France. Those born in France came from 10 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
65 people named Allegro live in Switzerland.
They live in 6 of Switzerland’s 26 cantons, most of all in Valais.
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.
Nearby in the index
Surnames next to Allegro.
- Allec 132 · U.S. census
- Allee 2,669 · U.S. census
- Allegra 552 · U.S. census
- Allegre 123 · U.S. census
- Allegri 156 · U.S. census
- Allegrini 198 · U.S. census
- Allely 121 · U.S. census
- Alleman 4,318 · U.S. census
- Allemand 1,032 · U.S. census
- Allemann 195 · U.S. census
- Allen 482,607 · U.S. census
- Allenbach 233 · U.S. census
When the index is not enough
This page says where Allegro 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.