Searching for Nancy No Surname

I’m searching for a Cherokee ancestor of mine, but I don’t have a lot of information. Her first name was Nancy, but I only know her married last name as Boren, spouse of James R. Boren. She was born sometime around 1770 in Virginia, but submitted a Request to Join Colony (to Texas), listing herself as a widow in 1834. I believe she died February 11, 1851 in Reagor Spring, Texas. Her children were William, Mirium, James, Matthew, Elijah, and Michael.

Any information would be appreciated.