Cragbrow Clan

A distinct branch of the fabled Engineers Guild, the Cragbrow were amongst the first to found the hold of Barak Varr. Inventors from their clan are credited with creating the first steampowered vessels ever built — the many varieties of ironclad warships and strange submersible craft with which the Dwarfs ply the seas. Known for their eccentric behaviour, penchant for grog and their prolific use of salty curses, the Cragbrow are amongst the few of their race to use nautical devices as part of their clan symbol. Not suprisingly, they have established close ties with Zhufbar and are regarded as unorthodox and a bit suspicious by most other Dwarfs - for they are a well-travelled folk and also willingly take to sea or the air. Many Dwarfs from the Cragbrow Clan train to become Gyrocopter pilots.

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