- Illinois: Believed to be derived from the Illiniwek Confederation of Native American tribes, which inhabited the region.
- Iowa: Originates from the Iowa tribe, who were indigenous to the area.
- Kansas: Derived from the Kansa Native American tribe, who lived in the region.
- Michigan: Comes from the Ojibwe word "mishigamaa," meaning "great water," referring to the Great Lakes.
- Wisconsin: Derived from the Ojibwe word "wishkonsin," meaning "gathering place."