1) Ancient people of Russia 
The Xueyantuo (薛延陀) (Seyanto, Se-yanto, Se-Yanto) or Syr-Tardush were an ancient Tiele people and khanate in central/northern Asia who were at one point vassals of the Gokturks, later aligning with China`s Tang Dynasty against the Eastern Gokturks. Xueyantuo started from Selenga River/Xueyanhe River (薛延河江/偰輦河江), so tribe nam....