Clan Helhein

The tale of Clan Helhein is a long one and full of sorrows. One of the so-called ‘Dragonback Clans,’ their hot-headed founder, Toruk Helhein, fell out with then High King Gorim Ironhammer during the Golden Age, leaving the Worlds Edge Mountains after a brief but bloody grudge-feud. Clan Helhein were instrumental in establishing the Ekrund Mines, their doughty but grim warriors winning many famous battles, including that of Dragonfire Pass. After the Fall of Ekrund, those of Clan Helhein that survived crossing the Badlands re-settled in Karak Eight Peaks. Although some of their clan remain with King Belegar today, most have wandered since the death of King Lunn - seeking their fortune in the Mountains of Mourn. Ill-luck, it is said, is their constant companion.

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