Writers change their names for various reasons. Some do it to keep their personal lives personal. Others do it because of fan loyalty. They may write in more than one genre and try to avoid disappointing the fans of a particular genre. Writers change their names to appear to be the opposite gender. Male writers who write romance novels and female writers who write science fiction are just two examples.
Whether an author changes their name or not, it’s usually a personal decision. However, if someone has the exact name of another author or one similar, the publishing company may require a name change. If the author has a name that is difficult to pronounce and/or remember, the publishing company may request the author change their name to a more memorable one. All of these factors should be taken into consideration when deciding on what name to use.