Actually, that is the title humans gave it. It is just kind of the title we all use as it is the strongest being in my universe. It doesn't have a name that we could comprehend so the Almighty became the default. It is also called Creator, Deus, and a few other titles/names. All the higher beings from my world are like that. For example, Demon Overlord Letriel is not my name, it is a title. If you wanted to pronounce my true name I'd have to rip out your tongue and reattach it. It is also the reason why titles hold such weight for my kind.