Hypnos

Hypnos
God of Sleep
Hypnos and Thanatos, Sleep and His Half-Brother Death by John William Waterhouse
Abode	Underworld
Symbol	Poppy
Consort	Pasithea
Parents	Nyx and Erebus
Siblings	Thanatos, Nemesis, Eris, Keres, Oneiroi, and many others
Children	Morpheus, Phobetor and Phantasos (according to Ovid)
Roman equivalent	Somnus

In Greek mythology, Hypnos (/ˈhɪpnɒs/; Greek: Ὕπνος, "sleep") is the personification of sleep; the Roman equivalent is known as Somnus.

In the Greek Mythology, Hypnos is the son of Nyx ("The Night") and Erebus ("The Darkness"). His brother is Thanatos ("Death"), both siblings live in the underworld (Hades) or in Erebus, another valley of the Greek underworld. According to rumors, Hypnos lives in a big cave, which the river Lethe ("Forgetfulness") comes from and where night and day meet. His bed is made of ebony, on the entrance of the cave grow a number of poppies and other hypnotic plants. No light and no sound would ever enter his grotto. According to Homer, he lives on the island Lemnos, which later on has been claimed to be his very own dream-island. His children Morpheus ("Shape"), Phobetor ("Fear") and Phantasos ("Imagination, Phantasy") are the gods of the dream. It is claimed that he has many more children, which are also Oneiroi. He is said to be a calm and gentle god, as he helps humans in need and, due to their sleep, owns half of their lives.

Hypnos lived next to his twin brother, Thanatos (Θάνατος, "death personified") in the underworld.

Hypnos' mother was Nyx (Νύξ, "Night"), the deity of Night, and his father was Erebus, the deity of Darkness. Nyx was a dreadful and powerful goddess, and even Zeus feared entering her realm.