How can we add floating widget on top of our player which will be "Player Name", saved in Saved game file (So that other players who are playing via LAN, can see names of other players)?

I have seen tutorials of blueprint mulitiplayer (Unreal Engine Youtube). They are awesome. I was thinking to add a floating widget so that player can see the names of each other. And, I also want to add that functionality which will tell that. “who killed whom”.
Looking for a positive response.