Amazing work, can't wait to see the release version!

It's really a shame that Paradox didn't hire you to do all the portraits packs. I totally think that they should have hired you into their permanent staff!
I agree with the posts above that there isn't much reason to make different faces for Scandinavians or Russians. Having some specifically Russian or Scandianavian beards/hairstyles would be enough, together with, maybe, complexion tweaked a little bit.
Clothing, on the other hand, is a whole different matter. If you're interested, here is the link to a website with some pictures of Russian medieval clothing, with both reconstructions and pictures from historical sources:
Russian medieval clothes (google translated from Russian). Note the links to the pages with men's clothing, women's clothing and headwear to the right of the page.
Another link with some commentary.