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[SW:TFA] Did Kylo Ren found the Knights of Ren; or did he just join them and become their leader?

While writing this it actually became a two part question; did Kylo Ren found the Knights of Ren, and is his name Kylo of the Knights of Ren or are the Knights of Ren titled as such because his name is Kylo Ren?

In TFA, Snoke refers to Kylo Ren as "master of the Knights of Ren" when Ren is telling Snoke about "the scavenger" resisting him. General Hux refers to Kylo Ren as Ren, now this is either a militaristic sign of respect, in calling people by their last name; or Ren is what he goes by. I bring this up because if that is his 'name' then it's possible to assume that the Knights of Ren were named after him. Or the other option is that his name is Kylo and Ren is the title given because of being a member of the group Knights of Ren.

I've been thinking about this since before the movie was released and pretty much every time I have watched it since (well over 30 times). So is Kylo Ren the founding member of The Knights of Ren? Is his name Kylo Ren, in regards to addressing hi; is he Kylo or is he Ren, or is it as simple as what we have been given Kylo Ren. I personally thought it was Kylo, a combination of s-KY-walker and so-LO.  I may just be putting way too much thought into this.
gpt
He did not found the Knights of Ren.  Ben Solo assumed the name Kylo Ren upon becoming a Knight of Ren.  It's a naming convention similar to the Sith, they don't all have the first name Darth.  "Master of the Knights of Ren" is a rank similar to Master Jedi.  There are more than one.  Hux refers to him as Ren quite possibly because he is not aware that it's not his official surname, though for all intents and purposes, it *is* his official surname now.