Native to Outland, some say the Gronn gave rise to the lesser ogres. Yet they show little love for their children, ruling the ogre clans with a brutal iron fist. Gronn wield fearsome power; however, they are not famed for their intelligence.
Prior to the orcish invasion of Azeroth, the ogres told the orcs that they were beaten and whipped by the gronn (many ogres bore whip scars on their backs). The ogres rebelled against the gronn with the assistance of Blackhand and the Orcish Horde. The gronn later came under attack by the black dragonflight when they attempted to settle the Blade's Edge Mountains. With some unexpected help from the heroes of the Alliance Expedition the Gronn and their ogre slaves sent the black dragons flying. Since then gronn seem to have become rather fond of dragon hunting — there are several fully grown adult black dragons found impaled on spikes within the Blade's Edge Mountains, whilst some gronn take related titles such as "Gruul the Dragonkiller" and "Gorgrom the Dragon-Eater". Baron Sablemane, a black dragon in disguise at the Circle of Blood in the Blade's Edge Mountains has this to say: "My loathing of interruptions is overshadowed only by my hatred of Gruul the Dragonkiller and his seven sons!".
In the upcoming expansion, players see an earlier, larger version of the gronn on Draenor. These gronn are subjugated by the Iron Horde to serve in their armies.
This article or section includes speculation, observations or opinions possibly supported by lore or by Blizzard officials. It should not be taken as representing official lore.
Given that most of the named Gronn are described as Gruul's sons, Gruul may be the first gronn, or else the being who created them.
Also, according to information regarding the temples of the damned built during the Second War, it is said that they were built using the remains of the "Giants of Draenor," which may or may not be the Gronn.
On the Burning Crusade teaser site Gronn were once described as immortal demi-gods. It was also stated that only seven were thought to be in existence.
Goc and Maggoc may be references to the ogres Gog and Maggog.