"Teslin Lake and River (not Hootalinqua nor Teslin-too)" adopted in the 1st Report of the Geographic Board of Canada, 1898; described as "in southern part of Yukon." Location description altered in the 11th Report of the Geographic Board of Canada, 1912, to "in BC and Yukon."
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office