Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
The name Kylo Ren sounds vaguely familiar to me. Is he a new character created for the new movie? If so, is there a related character with the last name Ren already in the canon (movies, books, comics, video games, cross-stitchings, etc.) somewhere?
Kylo Ren appears to be a wholly new character invented for the Star Wars 7 film. There are no mentions of him in any other literature pre-dating the revelation of his name in a trading card in 2015.
You may be confusing him with any one of a dozen Rens found elsewhere in the Star Wars universe, notably Kybo Ren, a pirate from the 'Star Wars Droids: The Adventures' TV series.
Required, but never shown