Mator

Mator or Motor is an extinct Samoyedic language, extinct since around 1839. It was spoken in the northern region of the Sayan Mountains in Siberia, close to the Mongolian north border. The speakers of Mator, Matorians or Mators [ru], lived in a wide area from the eastern parts of the Minusinsk District ( okrug ) along the Yenisei River to the region of Lake Baikal. Three dialects of Mator were recorded: Mator proper as well as Taygi and Karagas (occasionally portrayed as separate languages, but their differences are few). Mator was influenced by Mongolic, Tungusic and Turkic languages before it went extinct, and may have even been possibly influenced by the Iranic languages.‍ It went extinct as a result of the Mator people shifting linguistically to the related Kamas language or nearby Altaic-sprachbund languages, like Buryat, Soyot, Khakas, Evenki and Tatar.‍

A map of Siberian peoples in the 16th century with the Mators in   orange, near the bottom-center of the map. Today the term "Mator people" is simply a name of a seok of the Koibal, one of the five territorial sub-division groups of the Khakas. (Note that the name "Koibal" likewise derives from the related Samoyedic Koibal language).