sonofjones said:

Boba Fett is clearly supposed to have a name, but the movie fails to mention it at any point.

Says who?

He's just a Bounty Hunter. Why should we need to know his name? Are the names of Bossk, Dengar, 4-LOM or Zuckuss said in the film? No? Then I don't see your point.

Just because he's popular WITH US doesn't mean he should be significant enough to be named within the universe he inhabits.

Your assumption makes no sense whatsoever.

I'd even go so far as to say that the practically indiscernible (without already knowing what we're listening for) "Boba Fett? Boba Fett? Where?" should be removed from ROTJ:R. I can't help but think it was put in there because the action figure had been given a name and Lucas thought it would help sell more of them.