Nyx(noun)

(Greek mythology) Greek goddess of the night; daughter of Chaos; counterpart of Roman Nox

Nyx(ProperNoun)

The primordial goddess of night, daughter of Chaos.

Nyx

in the Greek mythology the goddess of night, the daughter of Chaos (q. v.), and the sister of Erebos (q. v.), one of the very first of created beings, the terror of gods, and by Erebos became the mother of Æther, pure light, and Hemera, daylight, as well as other entities of note.