If the 'story logic' applies, the hypothetical comicbook character should actually have some connection to 'antiques and collectibles', and I can't think of anyone much in Marvel comics who does. Unless you count Golden Age characters, the V Battalion, and that guy in the latest _Spider-Woman_ series who got the power of knowledge from the Gathering of the Five, and who I think runs a pawn shop or antique shop or mixture of the two. Or some super-thief like the Grey Fox or the Black Cat.
The /big/ alphabetical character index was
www.chronologyproject.com , but it's a while since I visited; still, it /should/ still be there...?
I'd be glad to be told that the name /isn't/ too ethnic and hard to pronounce and remember for a major character secret identity (or is it 'Black Cat' that's the secret identity, since people who know you, know that your name is Felicia Hardy, so that /isn't/ secret?) This is a comics line whose father-figure, though more ethnically named himself (though in the end he even legally changed name), gave characters simple common anglophone alliterative names so he didn't forget who was who, and he /still/ managed to fluff the Hulk as 'Bob Banner' (retcon ahoy).
[If you can't believe I seriously mean this - unfortunately I do. Hey, I'm British, what do I know from anything?]
If the name doesn't turn up on
http://google.com/ at all - even in real life - I'll guess it's a misspelling (although Google now catches those for you) or some kind of compound name of more than one person? (Some guy named Robb, for a start...)