When researching, you start with an idea and look for the evidence; this is especially how it goes with family history. Because, as it turns out, EVERYTHING genealogical is hypothesis.
It's a wise child, after all, who knows its father.
In my version of the tale as old as time, my granny was not a princess exactly, but a woman from the Flathead tribe.
Not for nothing, but does it not seem a LOT more truth-y to have Mashpee or Flathead than, say, Sioux or Cherokee heritage? I mean, that's detail that makes the story real.
That little old lady in the photo? I can trace her parentage three generations back and they all document as garden-variety English settlers who farmed that corner of Appalachia. Some lived in Cherokee, NC, so there's that, but alas, no Indian princess for me.