Stormpike clan

The Stormpike clan is a respected dwarven clan, and are well known for their fine and discerning tastes. They are apparently rich dwarves as well and are said to have an eye for excellence. Stormpikes don't like being bothered with trivial matters.

An expedition of the Stormpike clan called the Stormpike Guard has entered Alterac valley to "defend from the attacks from the Frostwolves", while looking for relics of their past (as they have an ancestral connection to the valley), and mining for resources.

Customs
The Stormpike clan's mount trainers have a tradition of etching their names onto the left horn of every battle ram they raise.

The Stormpike clan is renowned for their rigorous training methods.

In the RPG
The mighty dwarves of the Stormpike clan (and others) also train battle rams to serve as loyal mounts.

According to Brann the Stormpike clan have taken a liking to the Alterac Mountains and defend them fiercely against the trolls and orcs invading the area. By taking a few troll heads, the Stormpikes manage to form a close bond with Wildhammer dwarves. The Stormpike clan is also known for working with the Wildhammer clan, as well as some of the last high elves.

The war started because of a misunderstanding over religious beliefs; the orcs attacked the Stormpikes because the orcs' spirits had been desecrated, and the dwarves are not aware of the spirits. While Brann Bronzebeard understands why the Frostwolves want the land, he simply doesn't understand why the trolls want Alterac. The fighting in region became intense, with both Frostwolves and the Stormpike dwarves fighting over the resources in the area — mostly gold, steel and other types of metal. He feels these bizarre attempts to take the Alterac Mountains keep the Stormpike clan and their allies away from the front lines against the Scourge, and that it would be better if both sides would get along to fight the other threats.

Some humans help out the Stormpike clan as well. "Captain Balinda Stonehearth commands a massive human unit reinforcing the Stormpike clan in the valleys of the Alterac Mountains."

In Hearthstone
In Hearthstone, the following cards represent the members of the Stormpike clan:
 * HS Tavish Stormpike
 * HS Stormpike Commando

Speculation
Although Vanndar Stormpike leads the Stormpike Guard, it is currently not stated whether he is the leader of the Stormpike clan as a whole, but it may be the case.