Church or small church
Killion is an anglicized form of the Irish name Cillian. It is derived from the Gaelic word 'cill', meaning church, combined with a diminutive suffix, often interpreted as 'little church' or 'associated with the church'.
Less common today
Killion isn't in the latest US Top 1000. It last peaked at #8,722 in 2017.
US births per 5-year period, 1990–present (SSA data).
7th-century Irish missionary bishop
