I had the idea of a boy who was a wizard and didn't yet know what he was. I never sat down and wondered, "What shall I write about next?". It just came, fully formed.
J. K. RowlingAlbus Severus," Harry said quietly, so that nobody but Ginny could hear, and she was tactful enough to pretend to be waving to Rose, who was now on the train, "you were named for two headmasters of Hogwarts. One of them was a Slytherin and he was probably the bravest man I ever knew.
J. K. Rowling