quan_flo

This plugins allows administrators to rename wordpress usernames. 
The account owner is gets a notification email about the rename process.
Install, activate, and then go to the Users->Rename Usernames menu to rename user accounts.
More about me and my plugins
Since the year 1999 I do administration, customizing and programming for several forums, communities and social networks. In the year 2013 I switched from another PHP framework to WordPress. 
Because not all plugins I’d like to have exist already I wrote some own plugins and I think I’ll continue to do so.
If you have the scope at forums or social networks my other modules might also be interesting for you. <a href="https://wordpress.org/plugins/search.php?q=quan_flo" title="ifs-net / quan_flo WordPress Plugins" rel="ugc">Just take a look at my WordPress Profile to see all my Plugins.</a> Use them and if my work helps you to save time, earn money or just makes you happy feel free to donate – Thanks. The donation link can be found at the right sidebar next to this text.

Rename Users

This plugins allows administrators to rename wordpress usernames.

AboZain Albanna

Rename Default Post is a simple plugin gives you the ability to Rename your Default Post label to custom name in admin menu. 
Why would I leave my client a menu item that says ?Posts? when they are adding news updates, or portfolio items, 
 So you can simply use this plugin.
<h3>For Example Change Posts to News</h3>
How the plugin works: = 
Go to Settings -> Rename default post.

Rename default post Labels

Awesome

A simple, lightweight WordPress plugin Rename your Default Post labels to custom name in admin menu

Rename Users vs Rename default post Labels