The Isac surname
In the 2000 U.S. Census, 141 people carried this name — #114,852 among all U.S. surnames, about 1 in every 2,000,000 people counted.
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In France’s civil register
France’s register of deaths holds 53 people named Isac.
4 of them were born outside France. Those born in France came from 13 départements, most often Hautes-Pyrénées.
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 Switzerland’s population statistics
22 people named Isac live in Switzerland.
They live in 5 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.
Nearby in the index
Surnames next to Isac.
- Irion 1,091 · U.S. census
- Iris 260 · U.S. census
- Irr 151 · U.S. census
- Isaac 16,312 · U.S. census
- Isabel 1,011 · U.S. census
- Isabelle 1,020 · U.S. census
- Isaia 245 · U.S. census
- Isch 576 · U.S. census
- Iselin 370 · U.S. census
- Isern 206 · U.S. census
- Isidor 156 · U.S. census
- Isidore 482 · U.S. census
When the index is not enough
This page says where Isac 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.