"Aurore and Cephale", 1774 Pierre Narcisse Guerin Louvre Museum, Paris, France

Aurora or Eos was the Goddess of the dawn. Cephalus was the son of King Deioneus of Thessaly. Aurora fell in love with Cephalus and spirited him away but he rejected her, giving rise to other tragic events. 

There are at least 50 other entries focused upon sleep, slumber, Hypnos, Somnus, slip, Morpheus ...