I don't think it's relevant to the Sumter Does, but Googling told me Scandinavian Sami people also shows up as "Amerindian" in K13. I posted in
Delafield John Doe's thread, I believe this admixture tool is useful for genealogists like DDP bulding mother/father trees who can see the charts of matches too. For us amateurs (not all of us but me included) it's just a cause of discussion and arguments lol.
I was surprised how similar they are in number of matches. (This to me means they are from the same country that use gedmatch/ftdna equally much, so likely North America) One (Jane) is just a bit more lucky to have that "one" relative that has uploaded their DNA here. My highest match on gedmatch is at 53.9 cMs, lower than hers. I have very straightforward trees and names so I know she's on my paternal grandmother's side already, and my dad's ex-wife has been working on that tree for years. This match lives 20 minutes from me! Don't know her, never heard of her, but if she was left unidentified somewhere I could say exactly who she was in my tree and who her parents were.
Not in my matches are two of my maternal grandmother's brothers who emigrated to Canada and Argentina in the 1940s, and I've been thinking if anything happened to their kids or grandkids where they were left unidentified, I would be the only one on gedmatch knowing who their father was. I don't know these people either. I was close to my grandmother, but they wanted nothing to do with their origins.
There were some interesting things in my half brothers DNA results... looks like his dad was adopted from Scotland/Wales etc after WWII - I'm the only one curious though.
MY DNA is the most boring and expectable, was hoping to find at least some illegitimate kids there, or some Earls with unclaimed estates in the countryside! but no. But, I'll leave my DNA there, it's not my property, it belongs to so many.
Seriously, if you haven't done your DNA, consider it. You could be that one missing link. (imo)