Edward changed his name from Fields to Sixberry, somewhere between 1880 and 1900. (the 1900 census has him, his Mother and Sisters living in Phila, and his name is Sixberry there ) His Mother was Plasset Fields and his GrandParents were John and Meredith Fields, and they all lived in Caroline County VA. back in earlier census' and on a Plantation. But I'm not sure if they owned it, or worked it. As for being part Shawnee, I highly doubt that story....