I'm divorced now and I've updated my name in iCloud but when I send an email from @me.com email my hyphenated name still comes up. How do I change that?
Assuming that you're trying to change your full name (and not the email address itself), you can follow the directions in this Cnet article:
Your updated full name should then be used by the @me.com email address. The article also discusses how to change the displayed full name in the OS X mail client, but this example is a bit more generic.