"In the role-playing setting One World of Darkness, the concept of True Names is very expansive. The True Name of a being is like a platonic blueprint to the creature. A human's True Name can even change after life-altering events. It is a description of the being, from its internal organs to its very soul. All living creatures have one, but those with more intelligence have more complex True Names. A Fallen has a True Name given directly by God, but they are unpronouncable by mortal tongues because they are not words or names in the traditional sense; rather, they are a collection of abstract sounds and concepts, such as the sound of a hundred children laughing at once or the wind whistling over the entrance of a cavern. A Fallen's Celestial Name will suffice to fill out the power a True Name has over other beings. Magic is also easier to cast and stronger against a target whose True Name is known." True Name- In Popular Culture, Wiki
The Law of Names is related to both the Law of Knowledge and the Law of Association. The law simply states that by knowing the true and complete name of an phenomena or entity gives you complete control over it. There are two premises upon which this law is based: First, a name is simply a symbol of the definition of an phenomena or an entity. If the phenomena is fire, one simply says fire instead of describing the whole phenomena of fire. If the entity is a man, one just says a man. The names or terms fire and man convey the definitions of fire and man. Names convey definitions to others provided they are spoken in a mutual language spoken by both the speaker and listeners.