Wow, someone's finally had the guts to come out and ask this question! I mean, ever since I found out that the events of the Harry Potter books are in fact based on a true story, I have been itching to know his real name - I've just never managed to gather the courage to ask it out loud.
But since the books are autobiographical, I believe I have the answer. Harry Potter's real name is.... J.K.Rowling! Yes - but what the J.K stands for, I have no idea. Probably James Kalvin!
I wish you all the luck finding out if James Kalvin in fact is the *real* Harry Potter!
*whispers* In real life, his name is Logan Lerman, and he lives a super secrety life as a super secrety agent man, so... *averts eyes, which dart back and forth* ...you didn't hear it from me!!! *winks*
Bytheway, the whole wizard thing was just a cover-up.