
In English, the official name for the area was “Navajo Indian Reservation”, as outlined in Article II of the 1868 Treaty of Bosque Redondo. On April 15, 1969, the tribe changed its official name to the Navajo Nation, which is also displayed on the seal.[4] In 1994, the Tribal Council rejected a proposal to change the official designation from “Navajo” to “Diné.” It was remarked that the name Diné represented the time of suffering before the Long Walk, and that Navajo is the appropriate designation for the future.[5]
In Navajo, the geographic entity with its legally defined borders is known as “Naabeehó Bináhásdzo”. This contrasts with “Diné Bikéyah” and “Naabeehó Bikéyah” for the general idea of “Navajoland”.[6] Neither of these terms should be confused with “Dinétah,” the term used for the traditional homeland of the Navajo, which is situated in the area among the four sacred Navajo mountains of Dookʼoʼoosłííd (San Francisco Peaks), Dibé Ntsaa (Hesperus Mountain), Sisnaajiní (Blanca Peak), and Tsoodził (Mount Taylor).
https://en.wikipedia.org/wiki/Navajo_Nation#Terminology

https://en.wikipedia.org/wiki/Canyon_de_Chelly_National_Monument
Images by Getty images.