Your WordPress display name is shown publicly on posts and comments. You can update this name at any time from your WordPress user profile.
Follow the steps below to change your display name.
Step-by-Step Instructions
Log in to your WordPress Dashboard.
From the left-hand menu, navigate to Users > Profile.
Locate the Nickname field and enter the name you want to display publicly.
In the Display name publicly as dropdown, select the newly added nickname.
Scroll to the bottom of the page and click Update Profile to save your changes.