It's a bit less bad than I thought. Shame that trusted software like Avast cannot get into the other devices on the network and report their given names. I will have to pin a paper name list to my man-cave wall.
Or stop using the WiFi inspector, I very rarely run it, having run it once and essentially it found nothing untoward and nothing has changed. My Network router is protected, so unauthorised access is very limited and not allowed to public connections.
I have just run the WiFi inspector and it is as slow as watching paint dry. Aside from that nothing was found untoward though it didn't exactly give names as such the little icons help, one being a monitor (PC) and the other a Mobile icon (so probably my mobile phone or possibly my Android Tablet). But it doesn't find any vulnerabilities, which for me is the purpose of this scan.
Notably the second scan was a little quicker.