The term Greek Goddess of Night can be summarized by two crossword solutions: Nyx (3 letters) and Hecate (6 letters). Nyx was the primordial goddess of the night in Greek mythology, and was the daughter of Chaos. Hecate was a goddess associated with magic, witchcraft, necromancy, and crossroads. She was often depicted as having three heads or three forms, and was sometimes associated with the moon and the underworld.