Jonathon and Mary, daughter Suzanna
A fairly young and wealthy family in Hillsfar
It was the Berginblade estate that was under siege by brigands, which the group interrupted and in the investigation, discovered a hidden vault below the estate. What the vault contains, no one seems to know and Jonathon denies the siege was anything but a regular robbery.
Given the number of merchants outside the gate of the estate that day, it would seem likely that the Berginblades have significant merchant ties.