What would you call the moon of a moon?

Some scientists believe that moons, which are natural satellites that revolve around parent planets, have their own moons. So, what do you call the moon of a moon? A Moonmoon, duh. 

Others have weighed in with suggestions like submoons, Moonette or Moonitos.

But for now, it's Moonmoon. So, your moon name is officially your name + your name.

That is all.