Growing up, I always thought We'd find out in the PT that Obi-Wan Kenobi's real name was Ben Lars and that he and Owen are brothers. That Obi-Wan was Ben's Jedi name or some such thing. When the character Qui-Gon Jinn was announced, I was sure my hunch was correct. Qui-Gon sounds like Obi-Wan, so I figured that, again, it was just a 'Jedi name', not his real name.
I was wrong, it didn't turn out that way.
But it should have.