The entire region described in the original boxed set was IIRC named the Tyr Region by the Wanderer narrator. Bit insulting as Tyr has nothing special going for itself besides being the defacto starting point for adventurers.
I’ve seen people calling the region the Tablelands, even though that doesn’t actually cover all of the region.
There’s also the idea of the inhabited south and north. Together, those have a single name I could find, the heartlands.
What names have you found or invented to describe the Tyr Region and/or the wider region containing it? Basically, the lands once settled during the Green Age, in a radiating pattern around the Pristine Tower.