question: Duplicate or unnamed device entries appearing on router dashboard
answer: 
  This guide will explain why device entries might appear multiple times or listed as unnamed on your router dashboard and how to handle them.
  
  Every device has a default MAC address used by routers to identify it on a network. If it uses a randomized MAC address instead of the default one, this might cause it to appear more than once on your router dashboard.
  
  Jump to…
  
  What is a randomized MAC address?
  Why do my devices duplicate?
  Which of my devices use randomized MAC addresses?
  How to handle duplicate device entries on the router dashboard
  Why is my device listed as an unnamed device?