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.
Catawba people
Albert Gallatin (1836) classified the Catawba as a separate, distinct group among Siouan tribes. When the linguist Albert Samuel Gatschet visited them in 1881 and obtained a large vocabulary showing numerous correspondences with Siouan, linguists classified them with the Siouan-speaking peoples. Further investigations by Horatio Hale, Gatschet, James Mooney, and James Owen Dorsey proved that several tribes of the same region were also of Siouan stock.