Do you mean people who are originally from Siberia? If yes, I would say "The indigenous people of Siberia". "Residence of Siberia" means people who just love there, including every single person who is currently living there regardless of where they are from. "Aboriginals" is usually used when referring to the indigenous people of Australia. Although the word itself means "indigenous", It seems that majority of people would still use it only when referring to the Australian folks.

How handsomely to name residents of Siberia:)?> How should I classify those people who have been staying in Siberia since the dawn of history ? Answer > the indigenous people of Siberia, the Mongols, for example. Aboriginal people refer to those who are the first exist in a place, but they could have been displaced by people from else where, or they became indigenous , as time passed. Though the same, aboriginal connotes prehistory and a lack of civilisation .