Clan Gunnisson

Black-bearded and fierce, the Dwarfs of Clan Gunnisson trace their ancestry back to the warrior Gunn, son of Morgrim, son of Grimnir himself. They are the royal line of King Gunn, the first Lord of Mount Silverspear, yet when that stronghold fell to Orcs the survivors separated into three contingents. One settled at Karaz-a-Karak and its strong-armed warriors now fight for King Thorgrim. Another was lost in a failed attempt to win back their ancient hold. The last contingent, hardened veterans all, has never settled in the same hold for more than a few generations, but ranges the Worlds Edge Mountains. They are Orc-hunters, the vengeful sons of a line of kings — now a vagabond house whose only trade is war. No matter whom they serve, all of Clan Gunnisson bear a silver mountain symbol.

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