Erebus.

Erebus (Ἔρεβος) (Érebos) personified darkness in Greek mythology and his name means 'darkness' or 'gloom'.

His father was Chaos (χάος) (kháos). Also, Erebus had siblings: Eros and Nyx.

Eris, Hypnos, Nemesis (Νέμεσις) (Némesis), Hemera (Ἡμέρα) (Hēmérā), Thanatos (Θάνατος) (Thánatos), Charon (Χάρων), Hesperides (Ἑσπερίδες), and Phantasos (Φάντασος) were his offspring.

Erebus is associated with eternal darkness and the underworld.

Uranus.

Uranus (Οὐρανός ) was a god of the sky in Ancient Greece. His father was Chaos (χάος). His mother was Hemera (Ἡμέρα).  

Uranus was the first ruler of the world in Greek mythology. He lived in the sky. Uranus had a wife Gaia (Γαῖα).

He had many different children. The Titans, the Giants, the Cyclops, the Meliae, and etc.

Nyx.

Nyx was a goddess of the night in Ancient Greece. Her parents were Chaos. She had several children. They were very different. The god Helios never looked at goddess's sons.

Goddess of the night met with other Greek gods. Nyx's house was situated in the abyss of Tartarus. Nyx and Hemera replaced each other.

There are many paintings and sculptures about goddess of the night. Also, the name of Nyx is recognized in science astronomy.

Source of image:

https://www.shutterstock.com/es/image-illustration/nyx-goddess-night-1481215892



Source of image:

https://www.shutterstock.com/es/image-photo/top-part-fountain-goddess-night-sculpture-241207993



Source of image:

https://www.shutterstock.com/es/image-vector/dark-gothic-goddess-night-1097290991