In Irish mythology, Cian or Cían (Irish pronunciation: [ciənˠ]), nicknamed Scal Balb, was the son of Dian Cecht, the physician of the Tuatha Dé Danann, and best known as the father of Lugh Lamhfada. Cían's brothers were Cu, Cethen, and Miach.
Cían was slain by the Sons of Tuireann, for which Lugh demanded various treasures around the world as éraic (compensation), according to the account in the "Book of Invasions" (Lebor Gabála Érenn, LGE) as well as the late romance version "The Fate of the Children of Tuireann".