Norgrimlings

All Dwarfs reserve a special loathing for Skaven, but the Norgrimlings have more reason than most. A mining clan out of Karak Eight Peaks, it was not unusual for a Norgrimling to go decades or longer without seeing the sun. Based in the lower levels, it was their kin that suffered the brunt of the ratmen’s invasion during their long siege of Karak Eight Peaks. The atrocities perpetrated by the Skaven when they finally broke into the deeps is part of a saga passed down by the survivors, told as a ‘coming of age’ tale to their young warriors. Now, scattered across many holds, some Norgrimlings still toil in the deep mines, but most seek to one day fight as Ironbreakers or Irondrakes. Although the clan was scattered for long ages, many have now gathered beneath the banner of King Belegar.

Source
pg. 29
 * Warhammer Armies: Dwarfs (8th Edition)