Hypnos Hypnos In Greek mythology, Hypnos (; , "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 lived 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.
Hypnos feared to enter her realm. His wife, Pasithea, was one of the youngest of the Graces and was promised to him by Hera, who is the goddess of marriage and birth. Pasithea is the deity of hallucination or relaxation. Hypnos used his powers to trick Zeus. Hypnos was able to trick him and help the Danaans win the Trojan war. During the war, Hera loathed her brother and husband, Zeus, so she devised a plot to trick him. She decided that in order to trick him she needed to make him so enamoured with her that he would fall for