BuddyPress Real Names allows you to change the regular nickname displayed for a user to anything you want.
Configure user display names using selected user fields (username, email, first name, last name, website, role) with batch processing.
Ajax powered admin page to show, edit, add, and remove user meta. Choose dropdown list by User Login, ID, or Display Name.
Force the user field "display_name" to be set as the user's first and last name.
Secures your wp site from hackers by hiding username of members from front side.
SX User Name Security prevents WordPress from showing your real Login everywhere. It ovverides the body_class function, User Nicename, Nickname and Display Name.
Change usernames easily
Search every username from the author in your Wordpress site.
Ensure user's nickname and display name are unique and not a display name or nick name or user name of someone else
Allows you to change the value of "Display name publicly as" in user profiles to any string