What is "falisci"

Falisci is the ancient Roman exonym for an Italic people who lived in what was then Etruria, on the Etruscan side of the Tiber River. The region is now entirely Lazio. They spoke an Italic language, Faliscan, closely akin to Latin. Originally a sovereign state, politically and socially they supported the Etruscans, joining the Etruscan League. This conviction and affiliation led to their ultimate near destruction and total subjugation by Rome.

Only one instance of their own endonym has been found to date: an inscription from Falerii Novi from the late 2nd century AD refers to the falesce quei in Sardinia sunt, "the Faliscans who are in Sardinia", where falesce is the nominative plural case. An Etruscan inscription calls them the feluskeś. The Latin cannot be far different from the original name. The -sc- suffix is "distinctive of the Italic ethnonyms".