The family is identified with the Hunkpatila band
of Oglalas during the adulthood of Old Man Afraid of His
Horse. His oldest son and namesake was born into that band
(ca. 1836), a kinsman named Yellow Eagle was identified
as the Hunkpatila chief in 1839 (by Joseph Nicollet), and
Old Man Afraid was rated the chief of the band in an 1867
tabulation. The band split over its stance toward the USA
- repeatedly after 1866, but finally in 1871 when the Man
Afraid segment settled permanently at Red Cloud Agency.
It then became regularly known as the Payabya band.
The non-treaty faction retained the Hunkpatila
name, and remained in the Powder River country, led by such
headmen as Little Hawk, Worm, Yellow Eagle (III?), and most
famously Crazy Horse. —
The following publications contain information about Young Man Afraid of His Horses:
Article: "Slaughter at Fort Phil Kearney" by J. P. Dunn, Jr. • Real West • Vol. VII, No. 37 • September 1964.
Internet Archive Article: "Young Man Afraid of His Horses (ca. 1830 - 1900) • Western Outlaw Lawman History Association • http://tiny.cc/a2i3oy • 2002.