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.
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.