Those are modern migrants to those regions and they are NOT natives to those northern regions. They don't even exist anymore cause the 1) there were so few of them who landed there post Ottoman times and 2) the cold harsh low uv radiation climate was not suited for them since those were never their native lands.
They've been there at least since the time of JASON!!!
At least TWO Russians have written books on the subject. ARE YOU GOING TO TELL THE FORUM THAT YOU KNOW RUSSIAN HISTORY BETTER THAN THE RUSSIANS THEMSELVES??? HUH???