Pendergrass Native American Lines

Hi imRoger Eutsler im reserching Eutsler, pendergrass, gregory, Lee, Whittinton, Large, Bertholf & other unknown connection lines :

( Great Grand Parents)

1.) Mary Maria Bertholf & Patrick Large

2.) Lucinda Elizabeth Large & Adam Eutsler

3.) Lula Lee (Mae?) Pendergras & John Randolph Eutsler

4.) John Eli Pendergrass & Lucinda Irabelle Whittington

5.) John Eley Pendergrass & Martha Elizabeth Gregory

6.) George W Gregory & Martha Ellender Nellie Lee

I have been told I have alot of native american blood from all these lines but unable to figure out who & where they came from. A lot of my close family is very dark complected and was told we all came from Cherokee decents:

A.) I was told that greoge W gregory tried to enroll but got rejected.

Any help would be Thankfull ..God Bless ..Roger Eutsler