A Primal Tribe of Nerath.
The third empire of primal humans on Nerath. (-806 to -538)
It unified the tribes of the Nairi and befriended the dwarven, elven, and Qualinesti (Eladrin). It waged a continuous war against the gnolls, minotaurs, and ogres of Nerath. It fought the bloodless Greystone War. While its greatest king fell in the Third Dragon War.
When the last king died, the majority of the Urartu return to their holy city of Kelishin to live in peace and harmony with the land, while a few looked for an answer to the fire in their blood in foreign lands.
[Think Germanic cultures of Roman era/Conan]