Killian is a variant spelling of Irish Cillian, an anglicized form of Ceallachan, made up of Irish ceall (church) combined with a diminutive suffix, so the name would mean “little church”. However, it’s also been linked to Irish ceallach meaning “strife” or meaning “bright headed”.
Killian is also Irish surname originating from the given name (also spelled Killeen and Killian).
Meaning: “little church” or “strife” or “bright-headed”
Usage: Irish, French, English
- Cillian (Irish)
- Cillín (Irish)
- Kilian (German, Irish, French)
- Kylian (French)