The Sebastiani surname
In the 2010 U.S. Census, 504 people carried this name — #42,937 among all U.S. surnames, about 1 in every 588,200 people counted. That is up 13% from 445 in 2000.
What the name means
The meaning of the Sebastiani surname
A surname originating as a patronymic.
From the male given name Sebastiano.
From Wiktionary, the free dictionary (en.wiktionary.org) — entry «Sebastiani» (Italian), by Wiktionary contributors · licensed CC BY-SA 4.0 (creativecommons.org/licenses/by-sa/4.0) · excerpt, lightly adapted.
In Argentina’s national register
At least 597 people named Sebastiani 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 France’s civil register
France’s register of deaths holds 240 people named Sebastiani.
54 of them were born outside France. Those born in France came from 28 départements, most often Bouches-du-Rhône.
Where it concentrates, on the mapWhere 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
100 people named Sebastiani live in Switzerland.
They live in 7 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 Belgium’s population register
At least 20 people named Sebastiani 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 Luxembourg Province.
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 Sebastiani.
- Scozzaro 187 · U.S. census
- Scuderi 1,383 · U.S. census
- Seach 160 · U.S. census
- Seba 401 · U.S. census
- Sebag 118 · U.S. census
- Sebastian 13,934 · U.S. census
- Sebastien 171 · U.S. census
- Sebert 495 · U.S. census
- Secco 195 · U.S. census
- Secher 109 · U.S. census
- Seck 1,364 · U.S. census
- Seckinger 782 · U.S. census
When the index is not enough
This page says where Sebastiani 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.