In Roman and Etruscan mythology, Mania (or Manea) was the goddess of the dead.
Etymology
Both the Greek and Latin Mania derive from PIE *men-, "to think". Cognates include Ancient Greek menos ("life, vigor") and Avestan mainyu, "spirit".
Rank
Mania, along with Mantus, ruled the underworld. She was said to be the mother of ghosts, the undead, and other spirits of the night, as well as the Lares and the Manes.