The policy was originally implemented to help create “a community of real people." It has loosened the restriction over time, letting users transfer their YouTube usernames and name +Pages anything they want.
Changing your name on Google+ will change it on all other platforms that the account is used on. Google provides a comprehensive guide to changing your Google+ name on its support page. It covers all bases and it’s quick and easy to do.
Google+ also apologised for its names policy being unclear and added that it hopes the change makes the Plus community more welcoming and inclusive.