I want to make a role play like some youtubers, but i do not know how to give other people nicknames. I really need help a.s.a.p and thanks for your help and time.
This is done using a serverside plugin. The plugin that I know of would use the command /nick player nickname to do it, but i couldnt tell you what it is unfortunately, I never saw the name of it. However, if you're trying to do this in singleplayer or a LAN server, I do not believe it is possible, unless a mod exists specifically for this. --- EDIT
Look in the comments below, Alex posted a helpful comment!