The Sámi (or Saami, also called Lapps) are the aboriginal inhabitants of northern Sweden, Norway and Finland. They call this area Sápmi. Population about 85,000, they are known as reindeer herders. Many books and official documents call these people Lapps, but they prefer to be called Sámi or Saami, the name they use for themselves.
For various Russian peoples, see http://www.geocities.com/Athens/Oracle/8226/sibnative.html (They list 85 groups. I don't know which ones are Northern.)
The Nordic FAQ at http://www.lysator.liu.se/nordic/scn/faq23.html has a section on the Sámi.