Labelled Atlinto River on 1897 "Map of the Canadian Yukon and Northern Territory of British Columbia", published for the Year Book of British Columbia. Labelled Atlin River on Geological Survey 1898 map of Yukon District and Adjacent British Columbia. "...still referred to by old timers as "Atlinto River." (7 November 1955 letter, Ottawa file 104N). See Atlin Lake.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office