Sisco
Likely a surname of Italian or related European origin, though the historical evidence here is too thin to pin down a single secure source meaning.
The #4,440 most common surname in the United States (2010 Census) — about 1 in every 38,627 Americans shares it.
Etymology
The excerpted historical sources do not give a clear derivation for Sisco, only scattered mentions of the name among other surnames. As a result, its root meaning cannot be stated confidently from these sources alone. In surname work, forms like Sisco are often explained as regional variants, diminutives, or adapted spellings of older continental names, but that remains tentative here.
History
The name appears in historical records at least by the 18th century in London, which suggests that bearers were already present in the English-speaking world by then. Later U.S. census data show a small but established modern American presence. The available excerpts do not identify a single founding family line or migration path.
Origin
Regions
Variant spellings
Fun fact
A 1901 genealogical note records a London marriage for a Francisco Sisco, showing the surname in use in early modern England.
From the historical record
“Blis. Twedy : St Peter, Comhill, I 25a. 1745. — Francisco Sisco and Mary Tweedy : St Geo. Chap. Mayfeir, p. 54. London, 5, 3 ; Philadelphia, 3, 2. Twelfthman. — ? Official, * the”
— A Dictionary of English and Welsh Surnames (alternate scan)