How do I change the name showing, not used, for my account name?

@Susandawolf It sounds like you are looking at your IMDb user account — this is different than an IMDb name page. Please see https://help.imdb.com/article/imdb/general-information/what-s-the-difference-between-an-imdb-page-and-user-profile/GHQEDYZ5DJ5Y8G5S

Hope this helps.