Origin: Probably Diné of the Navajo Nation

Likely originating from the Diné, a term used by the Navajo Nation to refer to themselves¹. The Navajo Nation, also known as Diné Bikéyah, spans over 27,000 square miles across the states of Utah, Arizona, and New Mexico². The term "Diné" translates to "The People" in the Navajo language¹, reflecting the community's strong sense of identity and unity. The Navajo people have a rich history and culture, and they continue to thrive and evolve, maintaining their traditions while also embracing modern progress^3,2.

Sources: 

1 en.wikipedia.org

2 navajo-nsn.gov

3 navajopeople.org