"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." The name Whiteswan River, applying to the watercourse flowing into the head of Teslin Lake, was adopted in the 5th Report of the Geographic Board of Canada, 30 June 1904. That watercourse was eventually determined to be the headwaters channel of Teslin River. The name Whiteswan River was rescinded and application of the name Teslin River was extended 17 January 1951 on 104O to include this channel.

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office

Teslin River headwaters at 58 59 - 131 15 in BC; flows northwest into Teslin Lake at 59 36 23 - 132 05 30 in BC, then continues northwest out of Teslin Lake into the Yukon River at 61 34 - 134 54 on map 105F/10. Total length = 393 miles.

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

Called Délin Chú in Northern Tutchone - the language spoken below (north of) Teslin Lake in the Yukon - meaning "water running out from the lake" (translation from Yukon Geographical Names Program).

Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office