Yevo

Yevo was a snow troll chieftain who was beguiled by the dark powers of Storlaga. At the behest of Sauron, Storlaga adventured in the north and found Yevo who told him of the Snow trolls that were slaughtered by a mighty Cold Drake. Agburanar was the dragon that did this act and Storlaga convinced Yevo to lead him to this dragon.

What occurred after this meeting between Storlaga and the Dragon Lord is unclear, but it was said that an uneasy alliance was forged, where the dragons of the Withered Heath would attack the Gardens of the Entwives.

After Storlaga returned, Yevo pledged his snow trolls to his service. Storlaga accepted his troops into his orc horde. Yevo became one of the best warriors in Storlaga's army, but was killed later at the retaking of Gundabad by Durin V.