The Dakota people are a Native American tribe and First Nations band government in North America. They compose two of the three main subcultures of the Sioux people, and are typically divided into the Eastern Dakota and the Western Dakota.
The Eastern Dakota are the Santee (Isáŋyathi or Isáŋ-athi; “knife” + “encampment”, ″dwells at the place of knife flint″), who reside in the eastern Dakotas, central Minnesota and northern Iowa. They have federally recognized tribes established in several places.
The Western Dakota are the Yankton, and the Yanktonai (Iháŋktȟuŋwaŋ and Iháŋktȟuŋwaŋna; “Village-at-the-end” and “Little village-at-the-end”), who reside in the Upper Missouri River area. The Yankton-Yanktonai are collectively also referred to by the endonym Wičhíyena (″Those Who Speak Like Men″). They also have distinct federally recognized tribes. – Wikipedia