Potnia

Potnia (PIE *potnih2, Sanskrit patnī), Ancient Greek for "Mistress, Lady", title of a goddess. The word was inherited by Classical Greek from Mycenean Greek with the same meaning and it was applied to several goddesses. A similar word is the title Despoina, "the mistress", which was given to the nameless chthonian goddess of the mysteries of Arcadian cult. She was later conflated with Kore (Persephone), "the maid", the goddess of the Eleusinian mysteries, in a life-death rebirth cycle which lead the neophyte from death into life and immortality. Karl Kerenyi identifies Kore with the nameless "Mistress of the labyrinth", who probably presided over the palace of Knossos in Minoan Crete.

Read more about Potnia:  Origins, Classical Greece, Etymology