Leoni surname: U.S. census count, rank and records | FamilyCrests

The Leoni surname

In the 2010 U.S. Census, 1,083 people carried this name — #23,472 among all U.S. surnames, about 1 in every 270,300 people counted. That is up 3% from 1,055 in 2000.

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In Argentina’s national register

At least 1,208 people named Leoni 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 map

Where they live today

Buenos Aires Province 437
Santa Fe 274
City of Buenos Aires 201
Córdoba 164
Chaco 34
Mendoza 25
Río Negro 18
Misiones 18

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 729 people named Leoni.

159 of them were born outside France. Those born in France came from 59 départements, most often Corsica.

Where it concentrates, on the map

Where they were born

Born outside France 159
Corsica 293
Bouches-du-Rhône 49
Paris 30
Meurthe-et-Moselle 24
Var 22
Gard 13
Moselle 12
Seine-Saint-Denis 11

Fichier des personnes décédées, INSEE — Licence Ouverte 2.0 · deaths recorded in France since 1970, by place of birth.

In Switzerland’s population statistics

605 people named Leoni live in Switzerland.

They live in 19 of Switzerland’s 26 cantons, most of all in Ticino.

Where it concentrates, on the map

Where they live today

Ticino 368
Zurich 44
Vaud 30
Geneva 28
Graubünden 20
Bern 17
Valais 13
Jura 13

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 Leoni 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

Hainaut 21
Limburg 7
Liège 6

Statbel (Statistics Belgium), family names of the population by municipality, 1 January 2026 — CC BY 4.0.

In the Nordic population registers

31 people named Leoni is counted in Sweden.

Sweden’s figure is from 31 December 2022, the last count Statistics Sweden published.

Counted, by country

Sweden (2022) 31

Own calculations based on data from Statistics Sweden (SCB), surnames with at least two bearers, 31 December 2022 — CC BY 4.0 (names with 20 or more bearers shown).

Who carried it

People named Leoni,
with a public archive behind them.

  • Pierleone Leoni
    Pierleone Leoni 1445–1492 · physician
  • Leone Leoni
    Leone Leoni 1509–1590 · goldsmith
  • Domenico Leoni d. 1592 · astronomer
  • Paolo Leoni d. 1590 · Catholic priest
  • Girolamo Leoni d. 1578 · Catholic priest
  • Ferdinando Leoni d. 1950

Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.

Nearby in the index

Surnames next to Leoni.

When the index is not enough

This page says where Leoni 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.

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