A Jedi hunter was an individual tasked with the hunting and killing of members of the Jedi Order. Grievous, the Kaleesh Supreme Commander of the Separatist Military, was trained in the art of lightsaber combat by Dooku and claimed the lightsabers of Jedi he slew as trophies. As the Clone Wars progressed, Grievous garnered a fearsome reputation as a formidable Jedi killer, striking terror into the hearts of Republic citizens.
Following the transformation of the Galactic Republic into the first Galactic Empire, the Inquisitorius rose as an organization of Jedi hunters trained by Darth Vader himself to harness the dark side of the Force and wield double-bladed spinning lightsabers as they assisted in the extermination of the Jedi. Emperor Palpatine had decreed that the Empire was to convert former members of the Jedi into Inquisitors, further cementing the downfall of the Jedi religion and perversion of the Force.