William George 1810

I decend from William George 1810, Lincoln, Co.Tn. His son William Alexander George was my Great Grandfather, his son Oscar Lee George was my Grandfather & his son Earl Alexander George was my father. The question is this, does anyone in this line know if there was Indian Blood here. I never new my Great Grandfather or Grandfather & have no pictures. I lost contact with my father at a young age, but have pictures. My mom said his brothers & he all looked like they had some indian in them.
This could come from my Grandmother's side, for I have a picture of her, but hard to tell. She was a Dowdy. I have heard this all my life about my dad & Uncles. Does anyone know?
Thanks in advance, Glenda