Churfirsten

Churfirsten is a mountain range in the Canton of St. Gallen, Switzerland. They form the natural boundary between the canton's Toggenburg and Sarganserland districts.
They are the southernmost range of the Appenzell Alps, separated from the Glarus Alps by the Seez river and Lake Walen.
They consist of a limestone ridge running east to west, with the individual peaks formed by erosion.
The ridge is defined much more sharply to the south than to the north, with an almost vertical drop of several hundred meters towards Walenstadtberg and eventually Lake Walen at 419 m. The southern slope of the range was significantly formed by the Rhine Glacier during the Würm glaciation.

The name is a plural, indicating the peaks forming the historical boundary of the bishopric of Chur.
It has historically also been folk-etymologized as Kurfürsten, i.e. the prince-electors of the Holy Roman Empire who in the later medieval period numbered seven, which in turn encouraged the count of seven main or "official" peaks.

Wikipedia