Well Wikipedia is in fact non-reliable source - if you want to seek the truth about Siberia. Siberia comes from pure ancient Slavic term "Sibi-raja" or Siba raja or Saba or Saba or Slava-raja or Seb-arya - which means "this is the land of  people (Aryan) - and Saba, Sava or Slava means "glorious". 

Slavic languages still use above 40 % of Sanskrit words - when Hindus use bellow 20%. This tells you a lot about "Sibiria" as "Turk" territory... what is next - Hebrew "Siv-