DescriptionThe origin of the name Teton for the river, mountains, and county is a combination, and possibly intentional confusion, of 2 root words. The Sioux name Teton came from the word, thi’thuNwaN (pronounced “TEE-too-wah”), meaning “village,” combined with the word thiN’ta, meaning “prairie.” This word sounds similar to the French teton, for “breast,” which was frequently used to describe mountains.Contributing InstitutionMontana Historical Society Library and ArchivesGeolocation[1]