Hi Sharon. I think all the Finnish medieval families are already connected to the World Tree via numerous profiles descended from those families. Some directly, like the Frille family. (Frilles are now under loop to be corrected, there are numerous mistakes in the Geni tree, at least in the Finnis side of that.)
Right now we estimate also that almost all the Finnish profiles are already in the World Tree, the percentage is very high. I think the right person to answer this question is Reijo, he has been here in Geni a very active for a long time as a curator and dealing with numerous projects.
There are quite many medieval persons/profiles who came to Finland during the years and started a Finnish line of noble families. In Finland it is very rare to have records of "normal" people immigrating here during the 1100´s-1500´s. Usually they were merchants, priests and noble members of families from different European countries.
There are some profiles intersecting, but because there are no records showing them being part of certain profiles or families abroad and connected directly to the World tree, they were cut out from these profiles. No proof have emerged even now.
Like Knight Peder Fleming and Tuve Månsson
I am glad to answer more questions you, or other curators may have.