如何在登录后回显姓名

Im using dreamweaver and wamp phpmyadmin. I made a login system in a Lightbox. It works perfectly. The form i made it's so it requires the email and password of the user. I want the Name of the person loging in to show on the index page as a (example) "Welcome, Monica", instead of the email which is the required field as you log in. Im using dreamweaver and wamp phpmyadmin. I mad