Cillian Meaning and Origin
Cillian is a boy’s name meaning “monastery, church” and is of Irish origin. A diminutive of ceallach ‘strife’ or possibly from ceall ‘monastery, church’. Borne by several Irish saints. The name Cillian is currently not in the US top 1,000 names.
Lists with the name Cillian: 50 Unheard of Unique and Totally Wearable Boys Names