A True Name is the name of a Fallen that reflects their true nature and identity as a formerly divine being; they were originally granted to them by God to reflect their position in Heaven and were altered when the Fallen were spurned. 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. * DTF: Demon: The Fallen Rulebook, p. 255-256