Bronzebeards Clan

When Rorek Bronzebeard led a portion of his clan, then the Stonebeards, away from their forges near the ruins known as Cragmere, they were considered outcasts. After years of wandering, the remnants of the clan made their way into the Grey Mountains where they pledged themselves to the Ironpick Clan, the rulers of Karak Norn. Renaming themselves the Bronzebeards, the clan has established itself as the best cannon makers west of Zhufbar.

Source
pg. 28
 * Warhammer Armies: Dwarfs (8th Edition)