How can my wife explain to gmail that her name changed when we got married?There does not seem to be a way to change my wifes Gmails email address to use my surname.  Whatever I try her now incorrect gmail address is in the senders header and some email clients display the value of the sender header rather than the from header.
How can I change my Gmail address?
gmail;account management
You cannot change an email address, you can change the display info, create a new account and/or add a second account.It isn't possible to change your  username once you've created an  address, but there are some options to  change the way your username is  displayed.The three ways to do what I think you are trying to achieve (change in the display name)  at least change how the display name appearsChanging the profile information in her Google Profile .This will affect all Google products.Changing it in her Google AccountGmail specific under Settings->Accounts and Import, edit info for all or just her default email address. Switch the option from (your name in Google accounts) to the desired display name.Edit, saw your updates : Try creating a second account and use the Import option to get mail from her old address.Update : Use the above settings for the display name. Import the new account FirstName.NewLastName@gmail.com to the old account. Then in your Account and Import settings choose FirstName.NewLastName@gmail.com as the default address to send mail as. Also switch this to enabled as well  Always reply from default address  (currently  FirstName.NewLastName@gmail.com)This wayRecipients see the new addressShe will always reply from her new addressLabels are maintained as the old account is being used.From here you can slowly make the transition from the old address to the new address since she has over 30 labels. 