Ponca and the mutually intelligible variety Omaha were first encountered along the Missouri River in Nebraska. Omaha-Ponca is a member of the Dhegiha branch of the Siouan-Catawban language family. Closely related Dhegiha languages include Kansa, Quapaw, and Osage.
Selected Language Information
Dorsey, James O. 1888. Ponka and Omaha songs. Journal of American Folk-Lore Vol. 2. 271-276.
Dorsey, James O. 1888. Omaha Songs. Journal of American Folk-Lore Vol. 1:1. 209-213.
Dorsey, James O. 1891. Omaha and Ponca Letters. Bureau of American Ethnology Annual Report 11. 1-127.