Extension:ShowRealUsernames

What can this extension do?
The SpecialListusersFormatRow extension extends the user listings produced by Special:ListUsers to include the registered real name of each user, displayed immediately following the wiki user name.

Usage
This extension operates automatically whenever the Special:ListUsers page is displayed.

Download instructions
Please cut and paste the code found below and place it in. Note: $IP stands for the root directory of your MediaWiki installation, the same directory that holds LocalSettings.php.

Installation
To install this extension, add the following to LocalSettings.php:

Also, if desired, modify the given  function to wrap the real name appropriately to link it to an entry in your corporate directory (e.g., if your wiki user names are aligned with some index into that corporate directory).