I think in a lot of case they just found names that were the same or similar and listed them. My Parks ancestors are listed as Shawnee even though they were either white or Cherokee. There were actual Shawnee who were named Parks, but not related to me. Very frustrating and mis-leading for folks who assume that something printed in a book must be correct. I wrote to Don Greene and asked for references or documentation so I could follow up and got nowhere because of course there isn't any! Kathie