Andrei or Andreya Shadrin (Russian: Андрей Шадрин) was a Cossack leader who founded a fortress at Endirey in the late 16th century.
Baddeley,[2] citing no source, says that in 1579 Yermak, “Andreya Shadrin” and another outlaw took counsel at the mouth of the Volga.
Yermak went north, Andreya went south and fortified “Terkee’’ and later settled at the present Enderey.
[Tyumen (ru:Тюмень (Северный Кавказ)) was destroyed by flood and replaced by Terkee or Tersky Gorod.
He mentions other stories about an Andrei who led various groups or founded various places in the North Caucasus.