About usernames
Your username is displayed to other users when referring to you. As an example, when you suggest an edit to a page, this is what will be displayed instead of your real identity. This helps to protect your anonymity.
Your username must be between 3 and 15 characters long, and may only contain lowercase letters (eg. janesmith). If your desired username has already been reserved, you will need to select an alternative.
You cannot change your username after you have registered.