Someone under his comment said Sir Dooble, which was one of my old nicknames.
Well, very coincidentally, I also go under the name of Sir Dooble. For no reason.
Are you certain? I've never met anyone else with even the name Dooble, let alone another Sir Dooble.
Also, did you go under that name in Blockland, and if so when? I've had it consistently since late '08, besides maybe a 3 month gap in like 2010.