How do I Hide my Name in the Admins List of a Facebook Group?
In the groups the creator becomes an admin, and there’s no way to hide that you are an admin or the creator. However, you can be automatically anonymous if instead of a group you create a Facebook page, which has almost the same functionalities than a group.
Page creators are always anonymous and their messages are shown as written by the page and not by some particular person.
Click here to see a guide to creating a page on Facebook.