The Ho-Chunk, also known as Hocąk, Hoocągra, or Winnebago are a Siouan-speaking Native American people whose historic territory includes parts of Wisconsin, Minnesota, Iowa, and Illinois. Today, Ho-Chunk people are enrolled in two federally recognized tribes, the Ho-Chunk Nation of Wisconsin and the Winnebago Tribe of Nebraska.
The Winnebago Tribe of Nebraska have an Indian reservation in Nebraska. While related, the two tribes are distinct federally recognized sovereign nations and peoples, each having its own constitutionally formed government and completely separate governing and business interests.
Resource: https://en.wikipedia.org/wiki/Ho-Chunk