FalIen Jedi

Anti-Jedi were Jedi who chose to reject the tenets of the Jedi Creed and embrace the dark side of the Force. Anti-Jedi consisted of fallen Jedi and dark Jedi -- once-light Jedi who had fallen to the dark side and uninitiated Force-sensitives with no prior Jedi training who began their careers under other Anti-Jedi. The first Anti-Jedi was believed to be Xendor, the founder of the Legions of Lettow, who was the first member of the Jedi Order to utilize the darker powers of the Force. Later Anti-Jedi included Exar Kun and Ruyn Phanius -- the founders of the Brotherhood of the Sith and the Neo-Sith, respectively -- and the Imperial Inquisitors, who served Emperor Palpatine during and after the Great Jedi Purge.

The term "Anti-Jedi" -- along with the terms "fallen and "dark Jedi" -- was generally perceived as a prejorative by those saddled with the label, as they themselves preferred to self-identify as ex-Jedi or Jedi who simply embraced a larger view of the Force. Similarly, light side Jedi detested the term "dark Jedi", as they considered it an abhorant oxymoron.