The Ktunaxa (Kootenay) are an Indigenous people who traditionally occupied territories in southeastern British Columbia, as well as in parts of Alberta, Idaho, Montana and Washington. The term “Kootenay” may be an anglicized form of an old Ktunaxa word.
Jr, Deward E. Walker. "Ktunaxa (Kootenay)." The Canadian Encyclopedia. Historica Canada.