Cillian
/K-IH-L-IY-AE-N/
Little church, war strife — Cillian is from the Irish Gaelic ceall (church, monastic cell), with the diminutive -ín. Once the name of a 7th-century Irish missionary saint, it has surged into the English-speaking mainstream through the actor Cillian Murphy.
See Cillian scored for your familyMeaning & origin
Cillian is a boy's name of Irish origin, traditionally used in Christian families. The name means "Little church, war strife — Cillian is from the Irish Gaelic ceall (church, monastic cell), with the diminutive -ín. Once the name of a 7th-century Irish missionary saint, it has surged into the English-speaking mainstream through the actor Cillian Murphy." and belongs to the Divine cluster — names rooted in sacred meaning and spiritual tradition.
Common among American, British, Irish, European families, Cillian carries cultural weight that goes beyond its dictionary definition — it's a name with a story and a community.
Numerology of Cillian
Numerology assigns each name a single-digit destiny number by summing its letter values. Different schools use different mappings — NameRoot computes both so you can see how Cillian resonates in either tradition.
How Cillian sounds
NameRoot scores the phonetic fit of every name against the sound of your last name. The pronunciation of Cillian breaks down into 6 phonemes: /K-IH-L-IY-AE-N/. In the app, you'll see how those sounds flow with your family name across rhythm, stress, and consonant clusters.
Nicknames
Common affectionate forms of Cillian — useful for everyday family conversation, early childhood, or as standalone given names themselves.
Variants across cultures
Cillian appears in different forms across languages and traditions. Each variant carries the same root meaning with a distinct sound and spelling shaped by local phonology.
The six signals, applied to Cillian
NameRoot scores every name across six independent dimensions. Here's how Cillian maps to each — install the app to see the full compatibility score for your specific family.
Names similar to Cillian
If Cillian resonates with you, these names live in the same world — drawn from the same tradition, sharing the same meaning, or echoing a similar sound.
From the same tradition
Other Christian boy names, common in American families
Sharing the same meaning
Other Christian boy names from the Divine cluster
Names that sound similar
Christian boy names that open with the same syllables as Cillian
Common questions about Cillian
What does the name Cillian mean?
Cillian means "Little church, war strife — Cillian is from the Irish Gaelic ceall (church, monastic cell), with the diminutive -ín. Once the name of a 7th-century Irish missionary saint, it has surged into the English-speaking mainstream through the actor Cillian Murphy.." It is a boy name of Irish origin, traditionally used in Christian families.
Is Cillian a boy or girl name?
Cillian is most commonly used as a boy name.
What is the origin of the name Cillian?
Cillian is of Irish origin, used in Christian tradition, commonly among American, British, Irish families.
What are common nicknames for Cillian?
Common short forms of Cillian include Cill, Killy.
What is the numerology of Cillian?
Cillian has a Pythagorean destiny number of 33 — the master teacher — unconditional love in action.
See how Cillian scores for your family
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