Mapuche language
The name of the Nahuel Huapi Lake in Argentina derives from the toponym of its major island in Mapudungun (Mapuche language): "Island of the Jaguar (or Puma)", from "nahuel", "puma (or jaguar)", and "huapí", "island". There is, however, more to the word "Nahuel" – it can also signify "a man who by sorcery has been transformed into a puma" (or jaguar).