Origin Notes and History:
Seton Lake adopted 26 June 1911 on Ottawa file OBF 0024, as labelled on Trutch's 1871 map of British Columbia; not "Lake Seton" as labelled on Lieut. Mayne's 1859 Sketch of Part of British Columbia, nor "Seaton Lake" as spelled on Jorgensen's 1895 map of British Columbia.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office
"After wife of A.C. Anderson, Hudson's Bay Company officer." [the explanation published in the 15th Report GBC is widely circulated and often repeated, but is not correct.]
Source: 15th Report of the Geographic Board of Canada, 31 March 1917 (supplement to the Annual Report of the Dept of the Interior, 1917, Ottawa)
"....In accordance with the wish of His Excellency Governor Douglas that I should name these lakes after myself, I have given my own name to one of them, so far deviating from the desire expressed as to give the second [lake] the name of a near relative and playmate of my early days, Colonel Alexander Seton of the 74th, whose heroic fate I also commemorate by naming the connecting link, the Birkenhead Strait, after the ship in which he so nobly perished...." (Footnote by A.C. Anderson on his map, accompanying the manuscript notes prepared by his son, J.R. Anderson)
Source: Anderson, James Robert; Notes and comments on early days and events in British Columbia, Washington and Oregon; manuscript, 1925 (Provincial Archives E/B/An 2)