Uto-Aztecan languages
Charles Frederick "Carl" Voegelin (January 14, 1906 – May 22, 1986), often cited as C. F. Voegelin, was an American linguist and anthropologist. He was one of the leading authorities on Indigenous languages of North America, specifically the Algonquian and Uto-Aztecan languages. He published many influential works on Delaware, Shawnee, Hopi and the Tübatulabal languages.