An asteroid and a dinosaur

One among the many guest stars on The Simpsons, she is among the wealthiest women in the world. She has an asteroid and a newly discovered dinosaur named after her. Much before she became as popular as she is now, she was asked by her publisher to cut short her name and use a pseudonym, as young boys may not want to buy a book written by a female author. She has even used Newt Scamander and Kennilworthy Wisp as pseudonyms for her books. Identify her.

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Question by Akshat Kumar