Manual:$wgReservedUsernames

Users: $wgReservedUsernames
List of account names that cannot exist.
Introduced in version:	1.6.4 (r13646)
Removed in version:	still in use
Allowed values:	array of strings
Default value:	see below

Other settings: Alphabetical | By Function

Details

Array of usernames which may not be registered or logged in from. Maintenance scripts can still use these

Default value

Current version

$wgReservedUsernames = array(
        'MediaWiki default', // Default 'Main Page' and MediaWiki: message pages
        'Conversion script', // Used for the old Wikipedia software upgrade
        'Maintenance script', // Maintenance scripts which perform editing, image import script
        'Template namespace initialisation script', // Used in 1.2->1.3 upgrade
        'msg:double-redirect-fixer', // Automatic double redirect fix
);

Prior to 1.13

The double redirect fixer has been added in 1.13.

Prior to 1.9.0

Prior to 1.9.0, the following default value was present:

$wgReservedUsernames = array( 'MediaWiki default', 'Conversion script' );