How did Chile get its name?

There are various theories about the origin of the word Chile. According to a theory by 17th century Spanish chronicler Diego de Rosales, the Incas of Peru called the valley of the Aconcagua "Chili" by corruption of the name of a Picunche tribal chief ("cacique") called Tili, who ruled the area at the time of the Incan conquest in the 15th century. Another theory points to the similarity of the valley of the Aconcagua with that of the Casma Valley in Peru, where there was a town and valley named Chili.

Other theories say Chile may derive its name from the native Mapuche word chilli, which may mean "where the land ends," "the deepest point of the Earth," or "sea gulls; or from the Quechua chin, "cold", or the Aymara tchili, meaning "snow".Another meaning attributed to chilli is the onomatopoeic cheele-cheele-the Mapuche imitation of a bird warble locally known as trile, before common in the central valleys.The Spanish conquistadors heard about this name from the Incas, and the few survivors of Diego de Almagro's first Spanish expedition south from Peru in 1535-36 called themselves the "men of Chilli." Ultimately, Almagro is credited with the universalization of the name Chile, after naming the Mapocho valley as such.