1) I remember that name!
2) Is it possible you were playing on one of the Other rogue clients? If that's the case, then you'd need to figure out which one, what email relates to that login, and then see if they still have them. If it Was on HC (SCORE, etc), then I guess it depends on what server (if it still exists) you had them on. With HC, AFAIK, so long as you're logging in with the right email, then you'll be able to get back where you were. One thing you could consider is to figure out When you last played as that could narrow down what you may have been on. I would think that HC could help check your email(s) to see if there are characters still there.
Do note that (again, AFAIK) HC has never been able to upload any live Alts from the client side as may (?) be possible for custom servers and those who have somehow downloaded their old Alts. I don't even think this last bit is a thing, but my brain is being squeezed by seasonal atmo pressure, so who knows. >.<