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.
Siuslaw language
Siuslaw is usually considered to belong to the Penutian phylum, and may form part of an Coast Oregon Penutian subgroup together with Alsea and the Coosan languages.