Hi @wfpeter!
Yes, all site content was created with that old username. However, I’ve always had a different nickname and ‘Display name publicly’ set to the nickname. I’ve also disabled displaying author name globally.
Maybe it would be a better practice to create another account, with less privileges – like editor – and assign all existing and future site content to that user – and only use the admin account when needed?
Thanks and Best wishes!
David