Kott-Assan

The Kott (Kot) language (Russian: Коттский язык) is an extinct Yeniseian language that was formerly spoken in central Siberia by the banks of the Mana River, a tributary of the Yenisei river. It became extinct in the 1850s. Kott was closely related to Ket, still spoken farther north along the Yenisei river. Assan, a close relative, is sometimes considered a dialect of Kott. The term kott may be derived from Buryat qota 'town', applied to neighbouring non-pastoral peoples, including the last few Kotts.

From Wikipedia · Kott language · CC BY-SA 4.0