The Castellan surname
In the 2010 U.S. Census, 249 people carried this name — #77,012 among all U.S. surnames, about 1 in every 1,250,000 people counted. That is down 6% from 264 in 2000.
In France’s civil register
France’s register of deaths holds 420 people named Castellan.
33 of them were born outside France. Those born in France came from 42 départements, most often Var.
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 Argentina’s national register
At least 387 people named Castellan 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 Switzerland’s population statistics
23 people named Castellan live in Switzerland.
They live in 4 of Switzerland’s 26 cantons, most of all in Bern.
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.
Nearby in the index
Surnames next to Castellan.
- Castanheira 193 · U.S. census
- Castano 6,133 · U.S. census
- Castel 711 · U.S. census
- Castelein 146 · U.S. census
- Castell 939 · U.S. census
- Castella 262 · U.S. census
- Castellana 386 · U.S. census
- Castellani 566 · U.S. census
- Castellano 11,238 · U.S. census
- Castellanos 30,859 · U.S. census
- Castelli 3,292 · U.S. census
- Castellini 376 · U.S. census
When the index is not enough
This page says where Castellan 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.