What are the names of Nyx's children?

Answer 1

Nyx had many children:

From Erebus:

• Hemera (Day) In other myths she is sister of Nyx.
• Aether (Upper sky)
• Epiphron (Prudence)
• Thanatos (Non-violent death)
• Hypnos (The sleep)

From Partenogenesis (by herself):

• Hesperides (Nymphs of sunset, in other myths are daugthers of Atlas)
• Momo (Satire)
• The Moirae (Fates)
• Apate (Deceit)
• Ponos (Hard labor)
• Moros (Doom)
• Oneroi (the thousand personifications of the dreams)
• Keres (fates of death)
• Charon (Ferryman of Hades )
• Philotes (Love and friendship)
• Geras (Old age)
• Nemesis (Retribution)
• Eris (Discord, though most say she is the daughter of Zeus and Hera)
• Oizys (Distress)
• Styx (Boundary between life and death. In other myths its daughter of Oceanus and Tethys).

From Cerberus:

• Hellhounds

By Ouranous:

Lyssa (madness)

copied from camp half-blood wiki

Answer 2

Nyx, the Greek goddess of night, had many children including Hypnos (god of sleep), Thanatos (god of death), Eris (goddess of strife), and Moros (god of doom).