Microsoft Word: Authors: and Title: in Word document name...?

I just hovered over a few saved Word files in a folder and there are various headings visible. (Type:, Size:, Date Modified:, etc.)

Two headings are Authors: and Title: (These do not appear in all files.)

In quite a few of the files, these headings are filled in as follows...

Authors:Paul

Title:Paul Mullan

Needless to say, I have absolutely no idea who Paul or Paul Mullan are. And, no one else has access to this computer.

Any idea what's going on here? 🤔

Thanks.

D.