Oscans
From Wikireedia
Oscans are perhistoric inhabitants of southern Italy. Their original habitat of Campania gradually shank. When Sabelli replaced them in Campania and elsewhere, their name survived for the newcomers' language, which the ancients called ‘Oscan’. Samnites, Frentani, Campani, Lucani, Bruttii, Mamertini (see Mamertines), and Apuli all spoke Oscan.
