Although many people called it the extreme north, the continent of eternal winter in the northernmost part of the world, that place actually had no concrete name.
Besides the extreme north, the extreme south was also known as the only continent where the world laws of the three worlds merged into a unique law under an extremely cold environment. Yet, the two eternal winter regions were named differently depending on the place.
As for the extreme north, just like the extreme south, it was just a nickname used to simplify things. In some places, Quadtria's North Pole was also known as the Eternal Night Icelands, Arctic Veil, Frozen Tundra Stars, and many more.
Unlike the extreme south, the extreme north had something hidden deep in the world's northernmost region, the forbidden death zone, a place where no one had ever returned alive to share the tale of what was hidden there.
