To change your name on Facebook, go to Settings & Privacy > Settings > Accounts Center > Profiles > [Your Profile] > Name. Enter the new name and select "Review Change" before tapping "Save Changes." Note that you can change your name only once every 60 days, and it must comply with Facebook's name policies.
Go to Facebook settings, click “Accounts Center,” then “Personal details,” select your name, enter the new name, review changes, and save. Facebook may require verification before approval.