The Siouan (a.k.a. Siouan proper, Western Siouan) languages are a Native Americanlanguage family of North America. The Siouan family is related to the Catawban family, together making up the Siouan-Catawban family. Some authors use the term Siouan to refer to the Siouan-Catawban family and the term Siouan proper to refer to the Siouan family.
While the Lakota, Dakota, and Nakota comprise "the Great Sioux Nation", the language family is much broader and includes "the old speakers", the Ho-Chunk and their linguistic cousins, the Crow. The Siouan family also extends back East and down South.
While social migrations have yet to be definitively worked out, linguistic and historical sittings indicate a southern origin of Siouan people, with migrations over a thousand years ago from North Carolina and Virginia to Ohio, then both down the Ohio River to the Mississippi and up to the Missouri, and across Ohio to Illinois, Wisconsin and Minnesota, home of the Dakota.
Another view of both the Dakotan and Mississippi Valley branches is to represent them as dialect continuums. Notice: This article does not have information about the Virginia Souian group.
Parks, Douglas R.; & Rankin, Robert L. (2001). The Siouan languages. In R. J. DeMallie (Ed.), Handbook of North American Indians: Plains (Vol. 13, Part 1, pp. 94-114). W. C. Sturtevant (Gen. Ed.). Washington, D.C.: Smithsonian Institution. ISBN 0-16-050400-7.