Robert Grunwald was a German Shadowhunter who lived during the 18th century.
In 1721, Robert and his brother Harold set fire to a local tavern where the entire local werewolf pack was gathered, during the time of the Hunts, when both warlocks and werewolves were severely affected. This horrified even the Clave and resulted in a trial which led to the brothers being handed over to mundane authorities, who hanged them. The werewolf hunts died away completely after this.
- The Shadowhunter's Codex (mentioned only)