Origin Notes and History:
Tasoo Harbour identified in the 1930 BC Gazetteer. Spelling and form changed to Tasu Sound 14 June 1946 on 103SE. Tasu Sound confirmed 30 September 1946 on C354.
Source: BC place name cards, files, correspondence and/or research by BC Chief Geographer/Geographical Names Office staff.
Identified as Tasso Harbour in Sailing Directions, Queen Charlotte Islands - Western Coast of North America, 1853, p.11; remarks by George H. Inskip, Master, RN. (British Library 10496.i.29). "Tasu" (pronounced Tass-soo) is a Haida word meaning "lake of plenty".
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office