Facebook's rules dictate that you have to use your real name to maintain a profile on the popular social networking platform, but there is a way to change your name if need be. Hiding your surname gets a bit tricky, as Facebook wants you to use both your first and last names; but you can try to change your surname to something else, allowing you to "hide" your profile from people who know you by your real name. Facebook does review each name change, so be aware that your name change may be rejected.
Log into your Facebook account.
Click "Account" at the top right of the screen, then click "Account Settings." If the "Settings" menu is not the first menu to load, click "Settings" at the top of the next page.
Click "change" next to "Name." You'll now have the option of changing your first and last name. Type in an alternate last name next to "Last Name." If you want, also include another alternate name -- in this case it could be your real name -- into the "Alternate Name" box. Click "Save Changes."
Read the disclosure at the next page, and follow the instructions to move forward with the name change. Your new name may appear on your Facebook profile shortly, if approved.