I'm not sure if this is the same person, but I have the following about a Nancy
ALL. Brown, born about 1860:
The July 17, 1870 census of 135 Subdivision,
White County,
Georgia shows:
Cleveland Post Office
Page 66 (stamped page 28)
Household 357, Family 357
Lines 34-38
Delila Brown, age 58, widow, keeping house, born in NC
Jane, age 30, domestic servant, born in TN
Martha, age 28, born in TN
Nancy, age 10, at home, born in TN
Elizabeth, age 2, born in TN
If this could be your Nancy, let me know. Her grandparents were
Levi Brown and Delila
Helton and her mother is believed to be Martha Brown, who was not married.
I have later census information showing her and her mother as mulatto and black, which were terms sometimes used in the census for Native American. However, I don't have any evidence of a marriage.