Then why are you asking for it? First of all, don't even think about plugin development until you learn at least the basics of PHP and plugin development. Second of all, I am pretty sure that this thread follows none of the guidelines. You didn't provide anything except a very short description of what you wanted.
We are like code, we do what you tell us to do, not what you want us to do. We do our best to understand and if there is a mistake we give you [a] comeback/response/feedback.
This thread was created under "Plugin Development" not "Plugin Request" if you need a plugin made that will do so please correct the thread type, if you do want to create a plugin, code was provided, unless you do not understand the code I'll explain further. If you want to set name on let's say, PlayerItemHeldEvent PHP: public function onHeld(PlayerItemHeldEvent $event){ $player = $event->getPlayer(); $item = $event->getItem(); $item->setCustomName("Name"); $player->setItemInHand($item);}