I think in many cases, the “DJ name” thing is falling by the wayside unless you have a name that just doesn’t ring nicely on flyers.
My real name is Alex Moschopoulos. Imagine trying to put that on a flyer. “D-Jam” is the name my friends gave me back in 1992 and I just stayed with it.
Others actually will just make “normal sounding names”. Junior Vasquez is a prime example, since his real name is Donald Paul Mattern. Paul Van Dyk’s real name is Matthias Paul.
Some just go for the abstract, like Skrillex or Fatboy Slim. I only suggest many DJs to go on a domain name service and find a web address for whatever DJ name you choose. I also wouldn’t worry if some guy out there has the same name. Judge it by how “big” that guy is. When DJ AM popped up in the spotlight, I didn’t worry…because he and I were two separate entities and different kinds of DJs. Plus I was already moving my way back into the bedroom while he was blowing up.
Use what feels good to you, but make sure it has a nice ring to it, can be easily spelled, and you can get a web address for it. Also reserve the twitter name on that too.