MediaWiki:Signupend
From NOBUGS
Username Policy
Your username should reflect your real name - using a pseudonym or nickname is discouraged. Spaces are allow, so John Smith is a valid username and should be used instead of just John or Smith for clarity. You can use a shortened form of your first name(s) if you wish, but your last/family name should be present and written out in full e.g. you could use Bob Smith rather than Robert Smith. This is a list of current usernames.
You do not have to provide an email address during account creation, but until you have associated one with your account you will not be able to edit pages or request a password reminder.
