Checkaklis Island adopted 3 June 1947 on C.3683, as identified in Royal Commission on Indian Affairs, Vol IV, pp 884, 891. Name changed to Che:k'tles7et'h' Island per the provisions of the Maa-nulth Treaty, 1 April 2011.

Source: BC place name cards, files, correspondence and/or research by BC Chief Geographer/Geographical Names Office.

Entire island formerly Checkaklis Island IR 9; transferred in fee simple on April 1, 2011, to become Maa-nulth First Nation Lands of Ka:'yu:'k't'h'/Che:k:tles7et'h' First Nations.

Source: BC place name cards, files, correspondence and/or research by BC Chief Geographer/Geographical Names Office.

The Che:K’tles7et’h’ (Checleset, Cheklesaht) First Nation is positioned on the frontier between Nuu-chah-nulth- and Kwakwala-speaking territories, and its members traditionally spoke both language. They once occupied the shores of Checleset Bay but moved to nearby Mission Island in the 1950s. Today they live at Houpsitas on Kyuquot Sound, a village they share with the Ka:’yu:’K’t’h (Kyuquot) people, having formally amalgamated with that group in 1963. Both First Nations belong to the Nu-chah-nulth official newspaper, Ha-shilth-sa, translated the name Checleset as “people from the place where you gain strength.” The bay was named by the hydrographic service in the 1930s. Entry for "Checleset Bay," page 116.

Source: Scott, Andrew; "The Encyclopedia of Raincoast Place Names"; Harbour Publishing, Madeira Park, 2009, page 116.