|Titles||The Laughing Duke|
Source: Princes of Darkness, pg(s). 19
Nybbas was once a powerful angel in the service of Asmodeus. Trained by Baalzebul, Nybbas served as a general in Asmodeus's legions and followed his masters into Hell during the Exodus. Nybbas was slain by his one-time mentor, Baalzebul, and to this day his ashes fall unceasingly upon the fields of Cocytus.
- Nybbas (real-world demon) on Wikipedia