If you meant that you want to facebook.com/your_name.
You have to login first, then open this URL below :
www.facebook.com
you'll get your easy URL and update your desirable name. It think it is allowing you to update once, can not be changed later.
You have to login first, then open this URL below :
www.facebook.com
you'll get your easy URL and update your desirable name. It think it is allowing you to update once, can not be changed later.