teton

noun, plural Te·tons, (especially collectively) Te·ton for 2.

1. the westernmost branch of the Dakota Indians.
2. a member of any of the tribes belonging to this branch, as the Brulé, Hunkpapa, Miniconjou, and Oglala.
3. a dialect of the Dakota language.

noun

1. a river in NW central Montana, flowing E to the Marias River. 143 miles (230 km) long.

member of a western Sioux people, 1806, from Dakota titonwan, literally “dwellers on the prairie,” from thi + huwa. Not related to the Grand Teton mountain range.