Henery Oscar One Bull (circa 1853-1947) was a Lakota Sioux

Sioux

The Sioux are Native American and First Nations people in North America. The term can refer to any ethnic group within the Great Sioux Nation or any of the nation's many language dialects...

 man best known for being the nephew and adopted son of the great holy man, Sitting Bull

Sitting Bull

Sitting Bull Sitting Bull Sitting Bull (Lakota: Tȟatȟáŋka Íyotake (in Standard Lakota Orthography), also nicknamed Slon-he or "Slow"; (c. 1831 – December 15, 1890) was a Hunkpapa Lakota Sioux holy man who led his people as a tribal chief during years of resistance to United States government policies...

. He was also the younger brother of White Bull

White Bull

White Bull was the nephew of Sitting Bull, and a famous warrior in his own right. White Bull participated in the Battle of the Little Bighorn on June 25, 1876. For years it was said White Bull boasted of killing Lt. George Armstrong Custer at the famous battle...

, a famous Lakota warrior and chief contributor to Stanley Vestal

Stanley Vestal

Stanley Vestal was an American writer, poet and historian best known for his book Dodge City, Queen of the Cowtowns.-Biography:...

's biography of their uncle. He wore his Uncle's shield during the Battle of Little Bighorn. One Bull joined his uncle in fleeing to Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

 following the Battle of the Little Bighorn

Battle of the Little Bighorn

The Battle of the Little Bighorn, also known as Custer's Last Stand and, by the Indians involved, as the Battle of the Greasy Grass, was an armed engagement between combined forces of Lakota, Northern Cheyenne and Arapaho people against the 7th Cavalry Regiment of the United States Army...

 in 1876. Sitting Bull's band remained in the "Grandmother's Country" until he surrendered in North Dakota

North Dakota

North Dakota is a state located in the Midwestern region of the United States of America, along the Canadian border. The state is bordered by Canada to the north, Minnesota to the east, South Dakota to the south and Montana to the west. North Dakota is the 19th-largest state by area in the U.S....

in 1881. One Bull stood by Sitting Bull at his surrender.