This Plugin replaces the get_avatar function in pluggable.php to pass an alternate image to gravatar.com that generates the user’s display_name if they do not yet have a gravatar.
More features coming soon…
Plugin Updated Nov-17th

Display Name If No Gravatar

This Plugin passes an alternate image to gravatar.com that generates the user's display_name if they do not yet have a gravatar.

Seif Atalla

Dynamic Display Name Manager allows administrators to configure user display names using selected user fields with efficient batch processing.
<h4>Features</h4>
<ul>
<li>Flexible Display Name Configuration: Choose from username, email, first name, last name, website, and role fields</li>
<li>Batch Processing: Update existing users efficiently with progress tracking</li>
<li>Automatic New User Handling: Newly registered users automatically get the configured display name format</li>
<li>Real-time Updates: Profile updates trigger display name refresh</li>
<li>User-friendly Interface: Clean admin interface with progress indicators</li>
</ul>
<h3>License</h3>
This program is free software; you can redistribute it and/or modify 
it under the terms of the GNU General Public License as published by 
the Free Software Foundation; either version 2 of the License, or 
(at your option) any later version.
This program is distributed in the hope that it will be useful, 
but WITHOUT ANY WARRANTY; without even the implied warranty of 
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 
GNU General Public License for more details.
You should have received a copy of the GNU General Public License 
along with this program; if not, write to the Free Software 
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Dynamic Display Name Manager

Configure user display names using selected user fields (username, email, first name, last name, website, role) with batch processing.

Display Name If No Gravatar vs Dynamic Display Name Manager