The Leoncini surname
In the 2010 U.S. Census, 118 people carried this name — #141,140 among all U.S. surnames, about 1 in every 2,500,000 people counted. That is down 7% from 127 in 2000.
In France’s civil register
France’s register of deaths holds 131 people named Leoncini.
20 of them were born outside France. Those born in France came from 15 départements, most often Corsica.
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 Argentina’s national register
At least 107 people named Leoncini 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 Santa Fe.
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 Switzerland’s population statistics
35 people named Leoncini live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Ticino.
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.
Who carried it
People named Leoncini,
with a public archive behind them.
-
Giuseppe Leoncini 1601– -
Francis Leoncini 1915–1950 · aircraft pilot -
Francis Leoncini 1915–1950 · aircraft pilot
-
Lelio Leoncini 1548–1619 · artist
-
Andrea Leoncini 1708–1760 · painter
-
Adolfo Leoncini 1867–1957
Wikidata and Wikimedia Commons (CC0) · 10 lives in all are documented under this name.
Nearby in the index
Surnames next to Leoncini.
- Leo 8,039 · U.S. census
- Leon 86,363 · U.S. census
- Leonard 91,475 · U.S. census
- Leonardi 1,834 · U.S. census
- Leonardo 6,007 · U.S. census
- Leonce 233 · U.S. census
- Leone 15,364 · U.S. census
- Leonelli 347 · U.S. census
- Leonetti 1,646 · U.S. census
- Leonhard 1,135 · U.S. census
- Leonhardt 3,491 · U.S. census
- Leonhart 539 · U.S. census
When the index is not enough
This page says where Leoncini 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.