In Greek mythology, Hypnos (also spelled “Hypnus”) was the god of sleep and the son of Nyx, the goddess of night. He was often depicted as a handsome and youthful figure with wings, holding a poppy or a horn of sleep. He was considered to be a peaceful and benevolent figure who helped people to rest and rejuvenate.

Hypnos was often associated with his twin brother Thanatos, the god of death, and they were often depicted together escorting the souls of the dead to the underworld. He was also associated with the idea of restful and restorative sleep and was not seen as a malevolent figure like other sleep gods in other cultures.

Hypnos was also said to have a palace in the underworld where he lived with his wife Pasithea, the goddess of relaxation, and their children, Morpheus, the god of dreams and Phobetor, the god of nightmares.

In many myths, Hypnos was portrayed as having the power to put gods and mortals to sleep, and was often invoked by people seeking a peaceful rest. He was also known to have the ability to induce forgetfulness and was said to have been used by the gods to make people forget the secrets of the gods.