I hope you are the Sherry Grey that my Dad spoke of. He said we were/are related by way of his mother "Many Horses" was a younger sister to Aurther Sweeney. Yes, we are of native blood. Grandma & Aurther had the same mother but different fathers.
Arther was born on the Trail of Tears in 1838/39. He was left with a farm family by the name of Holland and later lived with 2 or 3 other families before he was out on his own. Their mother's name was Morning Star within her mother's people the Taylors along the MO River. She also had a Sioux & English name. I have the family Oral History if you are interested. Freda