Can I delete Templates which are not in my WORD-Template Folder?

Hi to all!

Newbie in this forum, so pardon my maybe stupid question.

I use Word 16.82 as part of a Office-365 License on a MacBook. When I open Word it shows up like in the attached screenshot (it's german).

There are a lot of "Templates" (I haved highlighted them red) which are not in my Template-Folder and nowhere else. I've searched the Mac for *dot Files. It finds the normal.dotm and another *dotm I have created myself, both in template-folder, but none of the red ones in the screenshot.

I want to delete this Ghosts. How do I do this?

Right clicking the templates does not do anything.

Can someone help?