You can use these user scripts with a user script manager like Tampermonkey extension - if you use Chromium based browsers like Chrome, Brave, etc. - or Greasemonkey extension - if you use Firefox.
Resolve MAC Addresses based on settings in Wireless MAC Filtering page. This let you better understand what device is actually connected to the network.
Tested on Tp-link TD-W8970 v1 Firmware Version:0.6.0 2.12 v000c.0 Build 140613 Rel.31066n