The word Tlingit means "human being." The word was used to show the difference of animals and human beings, because in the Tlingit culture animals and humans are very alike. Tlingit eventually became its national name. Some speculate that Tlingits have been around for about 11,000 years. The Haida people who are very close to the Tlingits have only been around for 200 years and the Tsimshian indians came from Canada's interior mainland.
Emmons, George Thornton. The Tlingit Indians. Seattle: University of Washington Press, 1991. Retrieved from on November 18, 2009. http://www.everyculture.com/multi/Sr-Z/Tlingit.html#ixzz0XILUQeBu