Adopted 3 October 1933 on Geological Survey sheet 307A, Portland Canal, as labelled on BC map 1H, 1917. Confirmed 5 November 1953 on 104 A.

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

Nisga'a name is T'aam Mits'iiaadin. T'aam Mits'iiaadin means "Lake of Mits'ii'aadin, where T'aam means lake and the phrase mits'iks aadin is a reference to a fishing technology used by Nisga'a ancestors here. A seine-type net was secured to moorings fixed to a rock bluff at the source of the Mits'ii'aadin River. Once there were fish in the net, the net was gathered up towards the rock bluff or beach area. Similarly, the phrase Tk'almits'dinhl aadin translates as "you push your net against or towards" (the rock bluff or shore). [tk'al/ against (something); mits/ squeeze, press, push; aat/ net; in/you].

Source: Nisga'a Tribal Council / Ayuukhl Nisga'a Department, Aiyansh BC

Misspelled "Meziadem Lake" on geological sketch map produced in 1910 by Mr. McConnell, and on Geological Survey sheet 69A, Route map of part of Nass River, 1912.

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

Indian word meaning "place of pearls" or "place of something beautiful" (information relayed July 1933 by Rev. J.D.McCullough, a Missionary at Aiyansh, through his son-in-law Mr. Priestly, file P.2.33). However, according to linguist Bruce Rigsby, the translation "place of pearls" or "place of something beautiful" is unverifiable, as Meziadin is a word from the language of the Tsetsault people, extinct since c1920.

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