Lampad

The Lampads or Lampades  (Λαμπάδες) are the nymphs of the Underworld in Greek mythology.

Mythology
Companions of Hecate, the Greek goddess of witchcraft and crossroads, they were a gift from Zeus for Hecate's loyalty in the Titanomachy. They bear torches and accompany Hecate on her night-time travels and hauntings. Some accounts tell of how the light of the Lampads' torches has the power to drive one to madness. They also serve as handmaidens to other Underworld goddesses, such as Persephone/Proserpina. They had parties called Mysteries, and they loved to play tricks on people. Some even say that they led travelers to their death. Others say that they helped people.

The Lampads were probably the daughters of various Underworld gods, Daimones, river gods, including Nyx.

The Lampads' Roman name is nymphae Avernales ("infernal nymphs").