There is a dialogue response in Morrowind where savants give you directions to the cavern, Nammu (no-name), claiming it is in the wildlands of Sunna Guradan:

To me, Sunna Guradan and wildlands sounds like they could be the describing the Grazelands. Interestingly, Nammu is http://www.uesp.net/maps/mwmap/mwmap.shtml?centeron=Nammu, even though the ground textures it lies on are associated with the Azura's Coast region.

TIL's translator did have suna, Ayleid for bless. And we have Gah-Julan which it is possible Guradan could have been derived from? Giving us Great Bless(ing). Which sounds like a good name for the Grazelands to me. But that's a stretch.

I'm curious if anyone else has any thoughts on this. I find obscure, unexplained things like this in the dialogue very interesting.

Edit: I should also mention that I like to entertain the notion that, in Morrowind, every place which is more commonly known by its Tamrielic name (Grazelands, Caldera, Inner Sea, etc) would have a Dunmeri name as well. So I think that Sunna Guradan may be the less well know Dunmeri term for the Grazelands.