Tocharian languages
The Tocharian languages, also known as the Arśi-Kuči, Agnean-Kuchean or Kuchean-Agnean languages, are an extinct branch of the Indo-European language family spoken by inhabitants of the Tarim Basin, the Tocharians. Wikipedia
Extinct: 9th century AD
Linguistic classification: Indo-European: Tocharian
Proto-language: Proto-Tocharian