I know that Inuit names are being used in Greenland and apparently Northern Canada but I also don't know when that began.
According to Wikipedia, Frobisher Bay became Iqualuit in 1987.
https://en.wikipedia.org/wiki/Iqaluit
I knew Iqualuit was well above the tree line, because I've been there for a fuel stop, but I didn't realize how much further south the tree line is in eastern Canada, as opposed to the west.
From "Inuvik and Iqaluit, tale of two cities: Canadian arctic from east to west":
https://tinyurl.com/y9qtplys