Wow, I tried to think of the most absurd comic last name to use from various heroes, and seriously couldn't think of one that was completely nonsensical. That's scary.
Hmm, let's see....Bruce Wayne, Clark Kent, Peter Parker, Reed Richards, Donald Blake, Matt Murdock, Hal Jordan, Barry Allen...
Ralph Dinby?
Billy Batson?
Edward Nygma?
Norrin Radd?
Mac Gargan?
They're out there...