The name generator gives you 15 random names suitable for the observers of the universe of Warcraft and for the universe of Warcraft in general. The observers are species of squid, floating creatures with seven eyes, each capable of fired magic beams. Observers are obsessed with magic and are willing to sacrifice their security, their service and even their freedoms if it is to be said that they will have an opportunity to observe and consume new forms of magic. There are also harder sound names, such as Xanzith and Shirzir, and mixes of both types. Of course, all are covered by this name generator.
To generate another 15 random names you just have to press the button. With every click 15 new names are generated.
You might have wondered if you can change your Observer name from the character sheet of the game. That's a good question. To be honest, it's a great question and you probably shouldn't have to ask it yourself, but it's out there and it deserves to be answered. If you change you Felhunter into an Observer, with the dialogue option to change your class name, you will switch to a different character and not your Observer. Changing the name of your Observer does not alter the class, nor does it alter any other part of your game. Simply changing your Observer name doesn't change the class.
Removing the class name and reapplying the new one doesn't work as well, either. This is a big oversight, which has been around almost since demon names were introduced in World of Warcraft. If you change any of your demon names, you will still be using that name even though it will be called by another name. There's actually a quest for it, and there is no way to get around that.
The best solution to changing your WoW Demon Observer name is to use a tool that can modify your character and have you name changed as well. If you use a WoW Demon Observer patch, this isn't possible. The key is to load your game and see what you'll be named, then click on the name of the Observer that you want to play and then use that name in game. When you're ready, change it back to the old name, which should be Observers, and get started enjoying your new demon Observer title.