Her real name was Joanne Rowling. When she wrote her first Harry Potter book she didn't want the boys to reject it because it was written by a girl. So she made the name J.K. which stands for Joanne...
Her given name at birth was Joanne Kathleen. And if you are wondering how Harry got his last name, the Potter family lived next door to J K Rowling during her early childhood and she always liked the...