The Lanni surname
In the 2010 U.S. Census, 1,311 people carried this name — #20,285 among all U.S. surnames, about 1 in every 227,300 people counted. That is down 1% from 1,329 in 2000.
In Switzerland’s population statistics
83 people named Lanni live in Switzerland.
They live in 9 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.
In Argentina’s national register
At least 66 people named Lanni 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 France’s civil register
France’s register of deaths holds 55 people named Lanni.
Most of them — 28 — were born outside France. Those born in France came from 6 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.
In Belgium’s population register
At least 23 people named Lanni 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.
Nearby in the index
Surnames next to Lanni.
- Lani 336 · U.S. census
- Lanier 20,997 · U.S. census
- Lanis 116 · U.S. census
- Lann 760 · U.S. census
- Lanners 503 · U.S. census
- Lannes 166 · U.S. census
- Lanno 170 · U.S. census
- Lannon 2,427 · U.S. census
- Lannoo 108 · U.S. census
- Lannoye 256 · U.S. census
- Lanoix 133 · U.S. census
- Lanore 228 · U.S. census
When the index is not enough
This page says where Lanni 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.