This will change the name it is listed under in both the Server List and the Legacy Browser.
Navigate to the Game Panel and proceed to login.
Click on Game Services button and if prompted select the server you would like to change the name of.
Navigate to Configuration Files.
Find the line starting with
hostname. Replace the contents of the speech marks to the right of
hostnamewith your desired server name.
hostname "Hexane Networks - Robust Hosting For You".