Grandmothers maiden name Harbin married name Frazier

I am trying to find any information about my native american history. My sister did our genealogy but refuses to share with us. My Fathers mother, Ola Mae Harbin married a Frazier  I believe my mother said his name was Willie. I know her and her family were all born in Alabama. My Mothers maiden name was Condrey and she too was born in Alabama to Clifford and Elease Condrey. Any help would be greatly appreciated. Thank you.