Unfortunately, no.
From what I remember, his profile was completely blank. There was a photo album on something like flickr her used for one of his roleplays that I might've been able to track him with, but this was five or six years ago. Since then, the site we were using crashed, and none of the data remains.
As for crediting him, I could, but it would just feel weird. For now, I've only used the setting for personal works, and I'm trying to get to the point where crediting wouldn't be necessary even if I did use it.