A family of Microsoft word processing software products for creating web, email, and print documents.
Not now, as I turned down the author information. But yes, it added specific people on its own. I had a different name set up on my other computer (I changed that to the same now), so it added that, then twice the one I used on my PC, and Microsoft Word (yes, that was there too in specific people). I had to remove them with inspection every other day.
If you usually save your documents in OneDrive, potentially you can avoid the problem by clearing the option to "Always use these values regardless of sign in to Office" at File > Options > General. Doing this would force Word to always use the user name stored in your OneDrive account.