Lillooet River adopted 26 June 1911, as labelled on A.C. Anderson's 1849 map, et seq. See Lillooet (municipality) for origin information.
Source: BC place name cards, or correspondence to/from BC's Chief Geographer or BC Geographical Names Office
nkúkwtsa is the Ucwalmícwts name - the language of the Lower Lillooet people - for the portion of Lillooet River below Lillooet Lake (June 2007 advice from Maurice DePaoli, Cultural
Researcher and Heritage Resources Advisor for In-SHUCK-ch Nation.) [Pronunciation and origin information to follow.]