Cillian
Cillian is a boy name of Irish origin meaning “Little church”, pronounced KIL-ee-an. It ranked #507 in the United States in 2025, given to 595 babies, and peaked at #463 in 2024. Common nicknames: Cill.
How popular is Cillian in the United States?
Data: U.S. Social Security Administration (SSA). Based on all Social Security card applications for births in the United States.
What does Cillian mean, and where does it come from?
Cillian is a striking Irish name from Cillín, built on "ceall" (church), and usually translated as "little church" — though some read it as "strife" or "war." Borne by an early Irish saint who brought Christianity to Bavaria, it carries deep Gaelic roots and a soft, arresting sound. The name has surged in recognition thanks to acclaimed actor Cillian Murphy, star of Peaky Blinders and the Oscar-winning Oppenheimer. Cillian fits beautifully among authentic Irish choices like Declan, Kieran, and Fionn. For parents who want a genuinely Gaelic name that feels both ancient and effortlessly cool, Cillian is a standout.
How is Cillian used around the world?
Cillian is used in 1 languages worldwide, with 2+ international variants. From the Irish Cillín, from "ceall" (church), meaning "little church" or "strife.".
TypeMale given name
Linguistic data: Wikidata (CC0). Variants and language usage may vary by region.
What are the nicknames for Cillian?
Famous People Named Cillian
- Cillian Murphy — Irish Academy Award-winning actor
- Saint Cillian — Irish missionary and patron saint of Würzburg
Similar Names to Cillian
If you like Cillian, you might also consider these names with a similar feel.
Sibling Name Ideas for Cillian
Looking for names that pair well with Cillian? Here are some sibling name suggestions that share a similar style and feel.
Frequently Asked Questions
What does the name Cillian mean?
Cillian is a boy name of Irish origin meaning "Little church." Cillian is a striking Irish name from Cillín, built on "ceall" (church), and usually translated as "little church" — though some read it as "strife" or "war." Borne by an early Irish saint who brought Christianity to Bavaria, it carries deep Gaelic roots and a soft, arresting sound.
How do you pronounce Cillian?
Cillian is pronounced KIL-ee-an. Common variations include Killian, Cillín.
Is Cillian a boy name?
Yes, Cillian is traditionally a boy name. Popular nicknames include Cill.