A commenter on the Adolf Hitler Campbell birthday cake thread asked: "What if the kid's name were Osama?" Of course, I take it that the question was likely to ask, "What if the kid's name were Osama Bin Laden Campbell?" But taking the questioner at face value, I looked it up, and found that Whitepages.com reports 1342 Osamas in the U.S., 19 of the Osama Ahmeds, just a bit fewer than the 1535 Adolfs, though many more than the 14 Hitlers (as a first name, mind you) and the 219 Stalins -- Osama has apparently long been a pretty normal Arabic name.

A cool search feature, incidentally, though I don't know how reliable it is.