Гарри Кимович Каспаров; born as Harry Weinstein by the way.
from what i heard, he was only named harry some time after his birth and unfortunately Potter was taken. anyways, some new username was needed for the future champ and we've all seen the luck that a handle like Va-silly can do to a chesser.
lol...it's a transliteration. There can be no talk of a "real" name here.
Interesting remark. However I must insist (but I suspect you know more than me on the subject),Garri = Гарри Gary=Гары Garry=Гарры
The only reason he is called "Garry" is because it was "anglicised".