Source: City of Secrets 2, pg(s). 27-30
The Vaor family used to be the most powerful group of wererats operating within Magnimar's Underbridge district. However, a confrontation with a group of Pathfinders damaged the family's reputation, and lead to the rise of the rival Steelwhiskers' Clan.
The Steelwhiskers managed to pilfer a number of illicit items from the Vaors during their rise to power.