I no I'm just asking if anything came out of thoes other land masses just like the red guards came out of yokuda and the nores, atmora. Also what's the name for everything, like the planes of oblivion Nirn and where the gods reside (also oblivion I think, just a different plane.)
Well, Pyandonea is the home to the Maomer, and Thras is the home of the Sloads. Akavir has several races (the Kamal, Tang-mo, Ka'Po'Tun, and Tseacsi [don't think I spelled that right]), and the Kamal and Tseacsi have invaded Tamriel. (they failed)
For your second question:
Imagine, for the sake of visualization, a circle.
At the middle of this circle is mundus. The mortal world. Mundus is orbited by eight planets, which are the Eight Divines, and two moons, Masser and Secunda. (The moons are the rotting corpse of Lorkhan) Beyond that, there is the void of Oblivion. Oblivion is most famously known for the 16 Daedric princes and their realms. (the realms are the princes themselves) So, Mehrunes Dagon resides in Oblivion and his realm is the Deadlands, for example. Then there is Aetherius, where the Magne Ge and Magnus fled to. (They realized what creating the mortal world would do to them, and fled. The stars are the holes they made when escaping to Aetherius)