Iron Cedar/Julia Clown was born at Powder River, Montana around 1864. Her parents are Women's Breast/Corn and Red Leg (d. 1905). She has three brothers: Chief Crazy Horse (half-brother, b. 1850); Peter Wolf and Leo Combing. Women's Breast/Corn was also the father of Iron Between Horn (f) and Bull Head (m).
Julia's father died or was killed in battle in 1874 when she was 8. At age 10, she was not at the Custer battle as they moved out before the battle. Amos Clown and Julia Iron Cedar were married in 1884 by a Congregational minister.
Source. Text of Ziebach Co., SD History (1982) - pages 300-320
Iron Cedar was Crazy Horse's sister and was not present during the battle at Little Bighorn.