Some might argue that J.K. Rowling is better off revealing more behind-the-scenes tidbits — or just creating new works altogether — than she is adding to the Harry Potter canon. After all, there’s less of a chance of her destroying the image that fans have of a character or a moment by revealing how she came up with it. Still, it’s her series, and she can choose to do what she will with it. For now, that means more of the prequel series, Fantastic Beasts — and probably some more random facts, too.
Article source: https://www.cinemablend.com/news/2547239/how-jk-rowling-came-up-with-the-name-for-one-fan-favorite-harry-potter-character