Killian is an Anglicized version of the Irish name Cillian. One possible meaning for the name is "Church of John", cill meaning "church" and Ian being the Anglicized version of "John". The Rev. Patrick Woulfe wrote that Cillian is the 'pet' diminutive of Ceallach which means "war" or "strife".
Spelling variations include Kilian, Killion, and others.
Read more about Killian: Notable People Named Killian, Notable People Named Kilian, Notable People Named Killion, Notable People Named Cillian, Places, Other Uses