They primarily live in the Cheyenne River Indian Reservation in South Dakota.
Itázipčho is also written Itazipcola or Hazipco and is a Lakota term translating as "those who hunt without bows."
The translator of Wooden Leg: A Warrior Who Fought Custer renders the name as Arrows all Gone.
[1] One of the many etymologies of the Lakota name tells the following story: The true meaning of Itazipacola is "no markings".
This is why when the Creator wanted to give the pipe to the Lakota, the White Buffalo Woman Wopi brought it to the Itazipco, because they would always be willing to share it.