Siouan languages
Siouan languages can be grouped into the Western Siouan languages and Catawban languages. The Western Siouan languages can be divided into Missouri River languages (such as Crow and Hidatsa), Mandan, Mississippi River languages (such as Dakotan, Chiwere-Winnebago, and Dhegihan languages), and Ohio Valley Siouan branches. The Catawban languages consist only of Catawban and Woccon.
Lumbee
After repeated rejections under the Croatan, Cherokee and Cheraw labels, the proto Lumbee petitioned the United States Bureau of Indian Affairs in 1924 for recognition as "Siouan" Indians. This petition was rejected largely on the grounds that Siouan was a language, not a tribe. Moreover, there was no record of the Lumbee or their ancestors having ever spoken the Siouan or any other Indian language.