Gmail Username can be Changed. Check How.
https://mexytek.blogspot.com/2017/06/gmail-username-can-be-changed-check-how.html
You can
change the name that displays with your email address, but not the email
address itself. For example, changing your username/email address from iloveyou@gmail.com
to ilikeyou@gmail.com is highly not possible.
Changing your Gmail username/email address
1.
You will need to create a second Gmail account > choose
your desired username
2.
Once that new account is created with the desired username, you
can set up forwarding from the old Gmail to the
new Gmail and check all of your messages in one place.
Changing the name displayed with your email address
For example, changing your name from Bob
<iliketurtles@gmail.com> to Sally <iliketurtles@gmail.com>
1.
Click the gear in the top right of your Gmail
page.
2.
Select Settings.
3.
Click the Accounts tab.
4.
In the “Send mail as:” section, click edit info next to the
address.
5.
In the “Name:” section, specify what you’d like your name to be
and click Save changes.