I am looking for my great great great great grandparents, William Prior Lewis(1843) and Francis Low(e)(1842). I believe their daughter Abijah Biga Ann Lewis(1873) was 100% Native American. I'm not totally sure if Lowe is Francis' maiden name. They were both born in Alabama. The spent most of their days in Coosa, AL or Marion, AL. I know for sure that William's parents were William Benjamin Lewis(1810) and Minerva Amisley Ward(1818). Francis' parents might be John Low(1811) and either Esther or Matilda. Some censuses say Francis was black-but that doesn't match old pictures I have. Oral family tradition says they were Alabama Coushatta, but I haven't been able to find proof of it, other than the fact that the family's migration across the US seems to match almost perfectly with the history posted on the Alabama Coushatta website. My mom recalls going to the Alabama Coushatta reservation near Woodville with her grandmother, Abijah's daughter, Jimmie Lee Carnes(Pyle)(1916) many times before her death in 1999.
Any info would be helpful. Thanks