Henderson Lake adopted 20 March 1917, not "Anderson Lake" as mis-spelled on BC Lands' map 18, 1912. Name changed to Hucuktlis Lake, 15 June 2018 on 93F/3, as recommended by Uchucklesaht Tribe and supported by the Alberni-Clayoquot Regional District (member communities of City of Port Alberni, District of Ucluelet, District of Tofino, Yuułuʔiłʔath Government, Huu-ay-aht First Nations, Uchucklesaht Tribe and Toquaht Nation, Electoral Areas "A" (Bamfield), "B" (Beaufort), "C" (Long Beach), "D" (Sproat Lake), "E" (Beaver Creek) and "F" (Cherry Creek).

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

The traditional name for Henderson Lake is Hucuktlis (December 2010 advice from Uchucklesaht Tribe). An image of the written name shows the preferred orthography. An audio recording provides pronunciation.

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

The name means "place way inside" in the sense of a protected area. (December 2010 advice from Uchucklesaht Tribe);
"Uchucklesaht Tribe membership traditionally used this lake as well as the lands and mountains around the lake for their spiritual practices. This lake has always been very precious and spiritual to the people of Houtchucklis." (September 2010 advice from Uchucklesaht Tribe)

Source: included with note

This lake received 16.61 inches of rain on 30 December 1926 - the most precipitation in a 24-hour period recorded anywhere in Canada, 1921-1950.

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