Storm giant

Storm giants are a mysterious race of giants that once resided in the Storm Peaks of Northrend. They were in charge of the crystalline golems that collect crystals from the Crystalsong Forest.

They are impressive, more than 30 feet tall and powerfully built. Storm giants are capable of summoning small storms. Myths say the titans created them. When the titans disappeared, the storm giants remained and claimed Ulduar. They developed crystalline golems to aid them in their research and to defend them. Over time the giants dwindled in number and grew ever more reclusive. They usually kept to themselves, hidden in their caves and tunnels below the surface, and avoided visitors. Soon only a handful remained. The giants are a dying race desperately trying to avoid their fate. They seemed to think another race would vanquish them some day, and so they hid in the Storm Peaks and Ulduar rather than girding for battle. They are too frightened to battle the Scourge, though apparently they hate it. Some resided in the Temple of Storms.

World of Warcraft
In World of Warcraft: Wraith of the Lich King, storm giants appear. The only generic storm giants that appear, the "Storm Giants", are now in the Howling Fjord, and not the Storm Peaks, where they can be found roaming.

They storm giants have been decimated by the Lich King. The Scourge now use the corpses of storm giants to create mindless flesh giants, or worse, stitched together aberrations like Thrym.

Gymer, king of the storm giants, was lured into a trap by his brother, Thiassi the Lightning Bringer, now an undead servant of the Lich King. By the time he realized that his cry for help was a trap, it was too late. He was now a prisoner of the Scourge and he feared that he would soon suffer the same fate as many of the other storm giants. However, he is later freed.

Other types of Northrend giant may be related to them, such as ice giants and fire giants (who dwell in the Storm Peaks).

Notable storm giants

 * Gymer

Aesir
The common term "storm giant" would be "aesir" when translated into the Titan language, thus, they would share the same name as the aesir titans.