Apple ID

Sorry, but not sure what you are asking. Your Apple ID is an email address. So, if you can get a new email address with teh preferred prefix, then you can go to: Apple - My Apple ID via a browser, click on Edit in the first section, change the email address used for the Apple ID to the new one you want it to be, and you are done.

BEFORE DOING THIS, however, be sure to sign the old Apple ID out of all services - especially iCloud - so you can then sign back in with the new ID after the change:

CHANGE APPLE ID - SIGN OUT STEPS

Best of luck,

GB

Apple Support article covering what gail posted.

Apple ID Name Change

You can create an alias, but you can't change an @iCloud.com, @me.com, or @mac.com e-mail address.

iCloud - Create or change email aliases