4) Rowling also has a pseudo name, Robert Galbraith and writes detective novel series

As a child, she always wanted to be called Ella Galbraith, although she has no real idea where the last name came from. 

The name Robert Galbraith came from J.K. Rowling’s pure love of the name Robert. Robert F Kennedy was one of her heroes, and she realized she hadn’t used it in any of her books published under J.K. Rowling. The last name, however, is a mystery within itself.