How did the name change on my apple account? How do I change it back to my name?

The email address or the name that shows when you log in below? To change the name that shows below, click Edit by the Account Section.

Apple ID - Manage

Note the restrictions in the name change article.

Apple ID Name Change

 What to do after you change your Apple ID or password - Apple Support     I suggest doing this before you change your Apple ID or password.

Go to settings and click on your iTunes/iCloud account at the top. Then click the top selection labeled Name and phone numbers and email. You will be able to change the name from there.