A quick visit to Amazon’s Kindle page will help you quickly change your Kindle’s Name ur E-mail Address. Here is how.
To make a change to your Kindle 1,2 or 3′s name and e-mail address: Go here.
First: Select the desired Kindle in the Your Kindles list and click the “Edit Info” link.
Second: Just enter a new name and/or e-mail prefix in the Edit Info box.
Third: Tap the Update information button when you are finished.
Your changes are now done. Hope this helps.