I Am Looking for Information on My Great Great Grandmother Mollie Tro

i am looking for information on my great-great grandmother, Mollie Troxell. she was suppose to be a full cherokee indian. She married a John Hendrix Davidson. Their Daughter Maxie Davidson was born in Rockcastle Kentucky October 14, 1899 and died February 17, 1966. It is very important to me to regain my heritage as a Cherokee Indian. What do I need to do to find this information? Any help you can give me will be greatly appreciated.