Res

Res is a mentioned location

Background
Joshua Graham refers to the location as somewhere east of the Grand Canyon. He tells the Courier that he believes the Dead Horses tribe members were originally refugees from Res, and that their language is a combination of their own and that of travelers who were visiting when the Great War occurred.

Behind the scenes
Several Navajo words (e.g. yá'át'ééh, meaning "hello" in the Diné language) are spoken by some of the tribal members when greeting the player character.