The Ianni surname
In the 2010 U.S. Census, 775 people carried this name — #30,222 among all U.S. surnames, about 1 in every 384,600 people counted. That is up 11% from 701 in 2000.
In Argentina’s national register
At least 772 people named Ianni 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 Belgium’s population register
At least 68 people named Ianni 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 Switzerland’s population statistics
64 people named Ianni live in Switzerland.
They live in 8 of Switzerland’s 26 cantons, most of all in Geneva.
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 · names with fewer than 3 bearers in a canton are not published.
In France’s civil register
France’s register of deaths holds 61 people named Ianni.
Most of them — 51 — were born outside France. Those born in France came from 5 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.
Nearby in the index
Surnames next to Ianni.
- Iacona 461 · U.S. census
- Iaconelli 183 · U.S. census
- Iacono 1,990 · U.S. census
- Iafrate 622 · U.S. census
- Iannello 518 · U.S. census
- Iannetta 412 · U.S. census
- Iannone 1,501 · U.S. census
- Iannucci 1,215 · U.S. census
- Ibanes 222 · U.S. census
- Ibanez 8,614 · U.S. census
- Ibarra 66,063 · U.S. census
- Ibert 113 · U.S. census
When the index is not enough
This page says where Ianni 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.