The
Greek god of
dreams, son of
Nyx,
Night.
Also, Oneiroi, plural, is used to refer to a group of 1000 daimones, who also act as the personification of dreams. Among them - Morpheus, Ikelos, and Phantasos. They flew every night from a cavern at the edge of Hades. Sometimes they are also referred to as children of Hypnos.