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Which seven bands were represented by the seven council fires of the Oceti Sakowin?

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A Cheyenne River Sioux dancer in colorful traditional regalia performs during the Grand Entry at a powwow, with an American flag and other participants in the background. — Oceti Sakowin A member of the Cheyenne River Sioux Tribe performing during the Grand Entry at the Cheyenne River Sioux Tribe Fair Rodeo and Powwow, Eagle Butte, South Dakota, September 4, 2016.

The Oceti Sakowin, which translates to "seven council fires," refers to the historic alliance of seven bands that constitute the tribe. These seven original bands are:

Mdewkanton
Wahpeton
Wahpekute
Sisseton
Yankton
Yanktonai
Teton1

These groups are linguistically categorized into three divisions—the Dakota, Nakota, and Lakota—all of which share a name meaning "friendly" or "ally." While the term "Sioux" is commonly used to refer to the Oceti Sakowin, it is an exonym derived from an Ojibwe word for the group, often translated as "enemies" or "little snakes."12