Doesn't really work for Google accounts that have reasonable privacy configuration, in which case it only tells you the email (which you specified), the account ID, the main account name and last profile edit. Of these the main account name might be the real name for many people, but I don't think that's required. The account name is also publicly used by Google in a whole bunch of places (e.g. when you read a Google Docs doc).

It also lists Youtube channels with similar names, which is generally wrong.