The name Liguria predates Latin and is of obscure origin. The Latin adjectives Ligusticum (as in Mare Ligusticum) and Liguscus reveal the original root of the name, ligusc-: in the Latin name -sc- was shortened to -s-, and later turned into the -r- of Liguria, according to rhotacism. Compare Ancient Greek: λίγυς, romanized: Lígus, lit. ‘a Ligurian, a person from Liguria’ whence Ligustikḗ λιγυστική transl. the name of the place Liguria. The name derives from the ancient Ligures people, although in reality the territory of this people was much larger than the current administrative region; it included all of North-west Italy south to the Po river, and south-eastern France.
Some scholars see a possible connection with Old European languages, as the formant -sc- (-sk-) is also present in names like Etruscan, Euskadi (the endonym of the Basques), and Gascon. Since these are all coastal regions, the shared formant may relate to a shared descent from pre-Indo-European, maritime peoples, and/or the hypothetical Tyrsenian and Vasconic language families respectively. This argument is weakened, however, by the fact that the name Etruscan is a relatively late exonym and the relevant endonym, used of the Etruscans themselves, was Rasenna or Raśna. (In Greek this mutated into Tursēnoi and Tyrrēnoi; in Latin it became Etruria and Toscana.)