 One theory suggests that it derives from the Rhaetic people, an Alpine tribe from Northeast Italy and the area which today comprises Switzerland and Tyrol, Austria; another that the term derived from an Etruscan general, Rhaeto, who supposedly lived around the area; and ultimately, that the name may derive from "risculada", a term local to the town which describes its type of cobblestone paving.The origins of the settlement of Rezzonico are also debated.It may have been founded by the "Orobii", a Celtic tribe which was settled in the areas around Como, Lecco and Bergamo, between the River Ticino and Oglio; there may have been an Etruscan origin of the settlement too; or it may have been founded by other Gaulish tribes, possibly even the "Senones".