Knights of Ren

The Knights of Ren are an antagonist faction in the Star Wars sequel trilogy, first mentioned in Star Wars: The Force Awakens. It's an organization that was formed sometime after the Battle of Endor and has existed in the years since then. They are currently led by Kylo Ren and are a sub-faction of the First Order. Since Kylo Ren is their leader, the organization has taken on his surname as a result.