The Fierro surname
In the 2000 U.S. Census, 11,891 people carried this name — #2,785 among all U.S. surnames, about 1 in every 22,700 people counted.
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In Switzerland’s population statistics
96 people named Fierro live in Switzerland.
They live in 8 of Switzerland’s 26 cantons, most of all in Vaud.
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 71 people named Fierro.
25 of them were born outside France. Those born in France came from 11 départements, most often Gers.
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 Fierro.
When the index is not enough
This page says where Fierro 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.