

I don’t know, but if you put some more effort into remembering people’s names you don’t have to get into these situations in the first place. I say this as someone who’s terrible at remembering names, but I have gotten better at it, and so can you.
Also, most times it’s fine to just say “a coworker” without specifying who it is unless people ask.
You can select a license with attribution attached, but put in your project info that you have no plans to ever enforce the rules of attribution but will strictly enforce the rules of open availability and free of charge.
No one will enforce rules for you that you as project owner/creator does not care about.