Doesn't, or in this case, didn't, Topps have a questionaire for each player to fill out that would provide the company with their correct information? Meaning, if Roberto filled one out for 1955, he naturally would have written, "Roberto", and Topps dutifully copied that.
Now, if you're really upset about your Clemente cards that have "Bob" instead of the proper "Roberto", look, I'll help ya out. Just send all those cards to me and I promise I will enjoy and respect them, as is. When I refer to them in front of my collecting chums, I will endeavor to address them as my neat Roberto Clementes that collectors gave to me 'cause they couldn't stand 'em anymore!!!
----Brian Powell