To update your name, while on your Google+ profile, click Edit Profile, select your name, and click on more options. From there you can enter your alternate name and choose how it will be displayed. Currently it’s not possible to go by just your nickname, but the option hasn’t been ruled out of future iterations. Google+’s VP of Product Bradley Horowitz alluded to future changes by stating that, “we don’t consider ourselves finished here,” in his post on Google+.
If your alternate name gets flagged you’ll be required to provide Google with information that confirms the use of that identity. This includes an established identity offline in print media, scanned official documentation – such as a driver’s license – or proof of an established identity online with a meaningful following.
While this might not lead to a surge in user sign-ups, it will certainly benefit anyone with a personal brand or known under a different name on other platforms or in print. For example, if you go as “Larry the Tax Guy” your Google+ profile can now reflect that.
For more information about the naming process, check out the Google+ Names Policy.