Mine is obvious. jaylake is my name, my auctorial brand. I originally looked at jlake, but it's a long-dead Justin Timberlake fan journal that's never been deleted, so the name wasn't available. That's for the best, as jaylake works better.
What's your handle mean? If you're a writer and you use an obscure handle, why? I don't want anyone to out themselves needlessly, I'm just wondering.