He was thus regarded as an extremely powerful deity. He was responsible for bringing sleep to all living things, both mortal and immortal. Hypnos was the god or daemon who personified sleep. In Roman culture, Hypnos was called Somnus or Sopor (Latin words for “sleep”). Hýpnos) is the Greek word for “sleep.” It is ultimately derived from the Proto-Indo-European * sup- no-, also meaning “sleep.”
The name “Hypnos” (Greek ῞Υπνος, translit.