The Sisco surname
In the 2000 U.S. Census, 7,811 people carried this name — #4,205 among all U.S. surnames, about 1 in every 34,500 people counted.
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In France’s civil register
France’s register of deaths holds 148 people named Sisco.
24 of them were born outside France. Those born in France came from 10 départements, most often Corsica.
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 Sisco.
When the index is not enough
This page says where Sisco 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.