In Greek mythology, Hypnos (/ˈhɪpnɒs/; Ancient Greek: Ὕπνος means 'sleep') is the personification of sleep; the Roman equivalent is known as Somnus. His name is the origin of the word hypnosis.
Ὓπνος: ὁ Гипн, Гипнос (божество сна) Hom., Hes.