Merit, Originator, and Progenitor
There was no one who should know the name of the Quest. He hadn't shared it with anyone.
The names the system gave to things were variable. It was based on a combination of what people used and sometimes hidden mechanisms that were far more complex.
For example, Sylas' first name was decided by the system purely based on what his legal name was. However, his true legal name was Sylas Brown, so why did it appear as Sylas Grimblade to the system?
He was certainly not the only one who was experiencing such a thing. And most importantly for this case, it wasn't just something people dealt with either.
There were certainly various names that people called this place. Some named it after the large number of Dire Wolves in the region, some extended the name of the Arctic Circle further north to this region, and there were some that even called it Evergreen.