Very good question. My family came from Finland, and they always seemed not originally "Scandinavians", although they may have been there earlier and spread through a wider third of Europe much further south. As the Uralic traces in Russian are found also in Baltic and linguists noticed it in other Indoeuropean proto-languages much East to India, deducting from it that it must have been "in touch" and maybe genetically interbreeding with the earliest proto-Indoeuropean itself and its speakers. A further question would be, if considering R1a's or N1c's as V or Z came from the Southeast with the Indoeuropeans and Uralics during the Neolithic or about, who were those who developed the late Paleolithic/Mesolithic Cultures seen over a wider area of the Baltic almost 'til the Rhin delta (and Ireland/Scotland...pre-Picts?)? Were the Saami already in place with the I and U people as the Ur-Scandinavians? To what degree all Scandinavians may have Saami ancestry, however diluded? And if the I1 came only late in the area..... which other Ydna haplotypes may have been in Scandinavia from the Ice Age refugees they came from? Assuming there was a surviving variety in Western-Central Europe as the Ice receded North