Siouan languages
Siouan or Siouan–Catawban is a language family of North America that is located primarily in the Great Plains, Ohio and Mississippi valleys and southeastern North America with a few other languages in the east.
Macro-Siouan languages
The Macro-Siouan languages are a proposed language family that would include the Siouan, Iroquoian, and Caddoan families. Most linguists remain unconvinced that these languages share a genetic relationship, and the existence of a Macro-Siouan language family remains a subject of debate.