Ethnonyms
The name Lakota comes from the Lakota autonym, Lakota "feeling affection, friendly, united, allied". The early French historic documents did not distinguish a separate Teton division, instead grouping them with other "Sioux of the West", Santee and Yankton bands.
The names Teton and Tetuwan come from the Lakota name títuŋwaŋ, the meaning of which is obscure. This term was used to refer to the Lakota by non-Lakota Sioux groups. Other derivations include: ti tanka, Tintonyanyan, Titon, Tintonha, Thintohas, Tinthenha, Tinton, Thuntotas, Tintones, Tintoner, Tintinhos, Ten-ton-ha, Thinthonha, Tinthonha, Tentouha, Tintonwans, Tindaw, Tinthow, Atintons, Anthontans, Atentons, Atintans, Atrutons, Titoba, Tetongues, Teton Sioux, Teeton, Ti toan, Teetwawn, Teetwans, Ti-t’-wawn, Ti-twans, Tit’wan, Tetans, Tieton, and Teetonwan.
Early French sources call the Lakota Sioux with an additional modifier, such as Scioux of the West, West Schious, Sioux des prairies, Sioux occidentaux, Sioux of the Meadows, Nadooessis of the Plains, Prairie Indians, Sioux of the Plain, Maskoutens-Nadouessians, Mascouteins Nadouessi, and Sioux nomades.
Today many of the tribes continue to officially call themselves Sioux. In the 19th and 20th centuries, this was the name which the US government applied to all Dakota/Lakota people. However, some of the tribes have formally or informally adopted traditional names: the Rosebud Sioux Tribe is also known as the Sicangu Oyate (Brulé Nation), and the Oglala often use the name Oglala Lakota Oyate, rather than the English "Oglala Sioux Tribe" or OST. (The alternate English spelling of Ogallala is deprecated, even though it is closer to the correct pronunciation.) The Lakota have names for their own subdivisions. The Lakota also are Western of the three Sioux groups, occupying lands in both North and South Dakota.
Read more about this topic: Lakota People