I don't think you can rename everything; I see a lot of "Kindles", too, and 4 Dots, an Echo and a Tap are running right now. Oh yea. there are two Fire TVs connected. All Amazon devices. 29 gadgets showing up for router roll call. The router is reading this info off the internal chip of device. But, even then, some devices must read something different.
Want some more confusion? Install the network sniffing app, Fing (no L in word)' I have it running on a Kindle and an iPad and even though it is the same app, the two tablets show different name in some cases.
Basically, the MAC address is best way to track a device down. As for me, it is an interesting non issue that doesn't concern me one bit.