Cian \cian\ as a boy's name is pronounced KEE-an. It is of Irish and Gaelic origin, and the meaning of Cian is "ancient". Name of Brian Boru's son-in-law, who played a major role in the battle of Clontarf (11th century). Variants are anglicized forms.

Cian has 3 variant forms: Kean, Keane and Kian.

Baby names that sound like Cian are Chan, Chano, Chany, Chann, Chane, Sean, Xan, Shan, Sion, Zion and Zan.