Long Chin (ca. 1800-ca. 1889) was a half-brother to Tall Bull. Both were the leaders of the Dog Soldiers in the 1850s and 1860s. The mother of the two headmen was indeed a Lakota woman. Long Chin was a council chief in 1854. In 1863, when he was already 63, he still led the Dog Men. — Dietmar Schulte-Möhring

There was an 84 year-old Long Chin in the Darlington Cheyenne census in 1887.

In Life of George Bent, he makes reference to the Dog Soldiers and Spotted Tail's Brules trading with Little Gerry in 1863, noting that Long Chin was a leader of the Dog Soldiers and there's a footnoted reference to the fact that Gerry married one of (the Cheyenne) Long Chin's Sioux nieces... He was also an uncle of Bent. — Grahame Wood