Cillian
Irish · Boy · 2 syllables
Popularity & facts
Relative popularity index, 2010–2025Popularity over time
Popularity indexHistorical popularity from 1880–2025 · US Social Security Administration data
About the name Cillian
Cillian derives from the Irish name Cillíán, a diminutive form of Ceallach, which means "war" or "strife" from the Old Irish root ceall.
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Etymology
Cillian derives from the Irish name Cillíán, a diminutive form of Ceallach, which means "war" or "strife" from the Old Irish root ceall. The name is primarily used in Irish and Irish-diaspora communities, with historical roots in early Irish Christianity, notably borne by Saint Killian, a 7th-century Irish missionary who evangelized in Franconia.
Cillian currently ranks #507 in the United States as a boy's name. It reached its peak popularity around 2024.
Variants & nicknames
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Sibling name ideas
Irish names that sit beautifully beside CillianSimilar names you might like
Names starting with CMore names starting with C
- Caleb
- Callan
- Caelan
- Callum
- Callie
- Caetana
- Cadhla
- Caio
- Cahir
- Caitlin
- Calvin
- Caetano
- Caiden
- Calum
- Caden
- Cairo
- Cali
- Callahan
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