For those wondering about the name of the stone. "Philosopher stone" is the original name. In the U.S. version they called it the "Sorcerer Stone" out of fear that the books wouldn't sell otherwise if the audience would think it was a book about philosophy.
Now the books being singed as "J.K. Rowling" in stead of "Joane Rowling" (as originally intended) is a bit in the same boat. They didn't want a woman's name on the cover afraid boys wouldn't boy the books if they knew the author was a woman. (Although a Dutch author I read a lot of books from as a kid, was also a woman, and I am a boy (or man if you wanna call me that), but maybe I'm just extraordinary).