Yesterday this portrait of Standing Holy was posted in a Native American Facebook group and it states:
Standing Holy, daughter of Chief Sitting Bull, Dakota, photo by D.F. Barry. 1885
which made me wonder if Geni has it right or wrong. So I looked up Sitting Bull's Wikipedia page and she's definitey listed there as a daughter, not a granddaughter. It shows her and Seen by the Nation as sisters:
https://en.wikipedia.org/wiki/Sitting_Bull -
Children
Crow Foot (son)
Many Horses (daughter)
Standing Holy (daughter)
William Sitting Bull, a.k.a. Runs-away-from-him/Nakicipa (son)[2]
Lodge in Sight (daughter)