How can I change my Facebook account name?
To change your Facebook name, log in to your Facebook account, then access the URL posted below. Click the Edit next to your name and input the new name, however, if Facebook conducts and search and finds out that you've changed your name and it's not the real one, you might need to provide identification documents or the account will be blocked.
Settings page: https://www.facebook.com/settings?tab=account§ion=name&view