Stonemasons Guild

The Stonemasons Guild was a guild of artisans and builders, similar to the dwarven Royal Stonecutters Union, with Edwin VanCleef as their guildmaster. They built Nethergarde Keep and were later contracted by the Stormwind House of Nobles to rebuild Stormwind City after the Second War. When the building was completed, the nobles refused to pay the workers and ordered the Guild disbanded, so many left with Edwin VanCleef and formed the Defias Brotherhood.

However, the guild did have some noble family supporters, such as Tiffin Wrynn‎.

Rings
The Collector's Ring suggests that members of the Stonemasons Guild got a ring for long membership from VanCleef.