The name Cian is a boy's name of Irish origin meaning "ancient". Cian and is often added to lists like Mythology Boy Names and discussed in our forums with posts like "A brother or sister for little Jack or Olivia".
From the experts:
A handsome Irish name for boys, very popular in that country, but in the US this traditional spelling might cause pronunciation problems. Still, whether Cian or Kian, it's simple and straightforward enough for the initiated. Cian is rising in the British popularity charts. This was the name of several legendary figures, including Cian, son of the god of medicine. His own son was Lugh, the sun god and father of the Ulster warrior Cuchulain and Cian is also the name of the son-in-law of the high king Brian Boru. So very well connected.