How to use one name in Facebook username?
- Search 'proxy.web.id' or use any proxy site using Indonesia location.
- Search 'mbasic.facebook.com'.
- Click 'continue anyway'
- Sign in to your Facebook account.
- Change the Facebook language to Bahasa Indonesia.
- Go to change username.
- Change your first name while leaving the middle and last name blank.
- Click save and type your password.
There you go and use your Facebook in just one name.