Hypnos comes from the name of his Latin counterpart, Somnus. (in- "not" + somnus "sleep"), as well as a few less-common words such as "somnolent", meaning sleepy or tending to cause sleep and hypersomnia meaning excessive sleep, which can be caused by many conditions (known as secondary hypersomnia) or a rare sleep disorder causing excessive sleep with unknown cause, called Idiopathic Hypersomnia. 3D model of "Bronze head of Hypnos" via laser scan of a cast of British Museum's bronze. Hypnos In Greek mythology, Hypnos (; , "sleep") is the personification of sleep; the Roman equivalent is known as Somnus. In the
Nicaea (mythology) Nicaea (mythology) In Greek mythology, Nicaea or Nikaia was a naiad nymph ("the Astakid nymph", as referred to by Nonnus) of the springs or fountain of the Greek colony of Nikaia in Bithynia (northwestern Anatolia) or else the goddess of the adjacent lake Askanios (Ascanius). She was the daughter of the river-god Sangarius and Cybele. By the god of wine, Dionysus, she mothered Telete (consecration) She was a devotee of the goddess Artemis. When a shepherd, Hymen, pursued Nicaea, she killed him with an arrow to the heart. This enraged Eros, who inspired Dionysus to fall in love with her.