To do something like this, you can use a select list with the name and the email address as the value. You can either get the names and populate the select list from a database, or manually insert the values into the select list. When the form is submitted, in your email object, you would want to bind the address to the value of the select list. If you are using Universal Email to send the email, in the wizard, you would click on the lightning bolt next to the to and choose the form field of the select list.