Here's some stuff about Crazy Horse's, half-brother, whose name was Little Hawk. (Guess why I like the name...)

"Little Hawk is the younger half brother of the famous Oglala warrior Crazy Horse (1838/1842-1877). He was the offspring of the remarriage of Worm, Crazy Horse's widowed father, to a pair of sisters of the Brulé Lakota chief Spotted Tail, Iron Between Horns and Kills Enemy.

The name Little Hawk was given by Crazy Horse's uncle Little Hawk, who then took the name Long Face. Crazy Horse's half-brother, Little Hawk, was killed in 1871, on a war expedition south of the Platte River. His uncle abandoned his name Long Face, and took back the name Little Hawk again. Tribal elders were said to have believed that Crazy Horse's half-brother would have been a greater man than his brother, had he had lived, suggesting that the namesake Little Hawk was held in high esteem among the Oglala for his abilities."