Cillian is a ♂ boy’s name.
The Irish name Cillian derived from the Celtic name Ceallach or the Irish name Cillín.
Cillian means “little warrior” and “bright-headed” (from Celtic “ceallach” = war/battle/strife/bright-headed) and “monk’s cell” or “little church” (from Irish “ceall” = church/monastery).
The name Cillian is ranked #341 overall.
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