Option to display only the first name for authors

I would like an option to display only the first name of users.

With the current random names (when 'Anonymize user data' is enabled), it can look sketchy, fake, or make it seem like we are commenting on our own posts.

Displaying both the first name and surname feels like too much information about the user.

Showing just the first name would be a good compromise between looking legitimate and respecting user privacy.