The Hildebrandts are a family of halflings who were set upon by Pike, Okultich, Klaproth, Ograbek, Milton, after that group parted company with Jarre and Melfi as they were travelling to Vizima to enlist in the Poor Fucking Infantry.
Rather than join up, the group decided to indulge in a little banditry and tried to rob the family of halflings. The Hildebrandts, including Rocco, did not take kindly to being robbed and defended themselves successfully, none of the would-be bandits survived.