Question: are all sith former jedi?
Answer: So yes, the Sith are mainly dark side because of former dark Jedi, but no, not all Sith were previously Jedi. The Sith Order was created and revitalized from the ranks of fallen Jedi. ... Some examples of Sith that were never Jedi were Darth Bane, Darth Maul, and most notably, Darth Sidious.