The world is considering renaming United States on their maps. As the indigenous people discovered and explored the land thousands of years before the first Europeans, it’s fitting that they should do it. Many nations made up the area. Is there any name that would be representitive of all?
There’s an argument that could be made for Iroquoia or Haudenosaunee. The Iroquois Confederacy was an alliance of five different native tribes who cooperated and jointly made decisions for hundreds of years before European colonists arrived, and that confederacy did serve as a point of reference when the earliest drafts of the Constitution were being written.
That said, the US is absolutely massive and there are way too many tribes with different languages and cultures. No one word is going to be a good fit for everything.