For all your posts, you may find that your user name is listed as the author name for all your posts. There is a super simple fix.
Log in to your WordPress admin panel, and click Users.
Click on your user name.
Scroll down to the “NAME” section. There you will see a space to enter your nickname. Here you can type in your real name, pen name or actual nickname.
The next line says “Display name publicly as:” and a drop down name. Choose one that is NOT your login name, and it will use the nickname for your author name, thus protecting your log in name.
Just a few simple steps to customize your login name on your WordPress website or blog!