Yes, renaming a Google Workspace User account is possible, and we can help you do this.

However, you should be aware of the impacts of this; here's a quick summary and the link below to Google's documentation for more details. 

In summary:

• The old user details can continue to appear for the people who have interacted with it, even when it's the new username
• All documents and data will be passed to the new user
• The old user name will hang around in contacts, autocomplete and directories for some time
• Initial login and future login can be problematic if the new user does not update the security questions etc.

We recommend deleting the old user and creating a new one fresh to avoid potential overlaps. This has a cleaner result, and if we delete a user first, you don't have a license increase. 

Here is the full detail from Google's support page.