The original inhabitants of the America is Americans
Throughout this book, as the reader already will have noticed, I use the term “Indian” to refer to the first inhabitants of the Americas. No question about it, Indian is a confusing and historically inappropriate name. Probably the most accurate descriptor for the original inhabitants of the America is Americans. Actually using it, though, would be risking worse confusion, In this book I try to refer to people by the names they call themselves.
( From 1491 – New Revelations of the Americas Before Columbus by Charles C. Mann )