Western Siouan languages
The Western Siouan languages, also called Siouan proper or simply Siouan, are a large language family native to North America. They are closely related to the Catawban languages, sometimes called Eastern Siouan, and together with them constitute the Siouan (Siouan–Catawban) language family.
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.