"associated with the church"
Origin: Irish Gaelic
Language: English
Killian
Pronunciation: [ k-IHLY-uhn ]
Does Killian flow with your last name?
An Irish saint's name with Captain Hook swagger
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Meaning & Origin
"little warrior, war-associated"
Origin: Irish
Language: English
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Things to Know About This Name
- The 'kill' prefix may give some parents pause despite having no violent etymology
The Story of Killian
Killian is an Anglicization of the Irish Gaelic name Cillian (also spelled Kilian), derived from 'ceall' meaning 'church' or possibly 'strife, associated with war.' Saint Killian (Kilian) was a 7th-century Irish missionary bishop who traveled to Franconia (modern Germany) to spread Christianity and was martyred in Würzburg around 689 AD. He became a beloved saint in both Ireland and Germany.
Killian has risen sharply in the US in the 2010s–2020s, partly inspired by the character Killian Jones (Captain Hook) in the TV series Once Upon a Time (2012–2018). Irish actor Cillian Murphy (Peaky Blinders, Oppenheimer) has further raised the profile of this Celtic-sounding name.
Saint Kilian is the patron saint of Würzburg, Germany, where his feast day (July 8) is celebrated with the Kiliani Volksfest. In Ireland, the name honors a 7th-century missionary who helped Christianize central Europe. The name has strong roots in both Irish and German Catholic traditions.
Historical Record
Killian first appeared in US Social Security records in 1982.
Over 15,436 babies have been named Killian in the United States since SSA records began.
Today, Killian is a hidden gem — rare but distinctive , currently ranked #370 for boy names in the US .
Fun Facts
- Saint Kilian is the patron saint of Würzburg, Germany — his martyrdom in 689 AD is commemorated with an annual folk festival
- Cillian Murphy, who plays Killian-adjacent character Thomas Shelby in Peaky Blinders, won the 2024 Academy Award for Best Actor for Oppenheimer
- The Kiliani Volksfest in Würzburg is one of Bavaria's largest annual festivals, drawing hundreds of thousands of visitors
Killian in Other Languages
Irish
Cillian
French
Killian
German
Kilian
Italian
Chiliano
Spanish
Killian
Popularity Over Time
#370
Current Rank
Rising
Trend
Hidden Gem
Based on SSA data 1880–present
Year-by-year popularity data will be available soon.
Famous People Named Killian
C
Cillian Murphy
Actor
1976
Irish actor known for Peaky Blinders and his Academy Award-winning role in Oppenheimer (2023)
S
Saint Killian (Kilian)
Religious
640
7th-century Irish missionary bishop who evangelized Franconia (Germany) and was martyred in Würzburg
K
Killian Jones (Captain Hook) Fictional
Other
The reformed pirate and love interest played by Colin O'Donoghue in Once Upon a Time (2012–2018)
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See all →Quick Facts
- Gender
- Boy
- Syllables
- 3
- Popularity Rank
- #370
- Total SSA Count
- 884
- Cultural Origins
- Irish French American English
- Pronunciation
- Easy
- Formality
- Moderate
- Cross-Cultural Ease
- Moderate
Common Nicknames
Killy
Kill
Ian
Middle Name Ideas
Suggested pairings based on syllable flow and style
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Timeless choice, smooth 2-2 syllable flow
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Timeless choice, smooth 2-2 syllable flow
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Timeless choice, English heritage match, extended 2-3 combo
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Timeless choice, French heritage match, extended 2-3 combo
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Timeless choice, American heritage match, extended 2-3 combo
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Timeless choice, smooth 2-2 syllable flow
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Timeless choice, smooth 2-1 syllable flow
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Timeless choice, smooth 2-2 syllable flow
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Timeless choice, smooth 2-2 syllable flow
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Timeless choice, French heritage match, extended 2-3 combo
Middle Names
Middle Names for Killian
7 name pairings with syllable flow tips
Sibling Names
Sibling Match
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Also a Girl Name
Killian is also used as a girl name, ranked #9219.
View Killian as a girl name →Similar Names
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Frequently Asked Questions About Killian
What does the name Killian mean?
"associated with the church" (from Irish Gaelic). "little warrior, war-associated" (from Irish). Killian is an Anglicization of the Irish Gaelic name Cillian (also spelled Kilian), derived from 'ceall' meaning 'church' or possibly 'strife, associated with war.' Saint Killian (Kilian) was a 7th-century Irish missionary bishop who traveled to Franconia (modern Germany) to spread Christianity and was martyred in Würzburg around 689 AD. He became a beloved saint in both Ireland and Germany.
What is the origin of the name Killian?
Killian has Irish Gaelic, Irish, French, American, and English origins. In Irish Gaelic, it means "associated with the church". In Irish, it means "little warrior, war-associated".
Is Killian a boy or girl name?
Killian is used as both a boy and girl name. As a boy name, it is ranked #370. As a girl name, it is ranked #9219. Killian is more commonly used as a boy name.
How do you pronounce Killian?
Killian is pronounced k-IHLY-uhn.
How popular is the name Killian?
Killian is currently ranked #370 in popularity for boy names in the United States.
What are common nicknames for Killian?
Common nicknames for Killian include Killy, Kill, and Ian.
What are good middle names for Killian?
Popular middle name pairings include Killian James, Killian Patrick, Killian Thomas, Killian Finn, Killian Rory, Killian Sean, and Killian Liam.
What are good sibling names for Killian?
Names that pair well with Killian as siblings include Cormac, Riordan, Aoife, Declan, Niamh, Brennan, and Saoirse.
How many syllables does Killian have?
Killian has 3 syllables, making it distinctive and rhythmic.
Is Killian a common or rare name?
Killian is a popular name, ranked #370 for boys. It is well-known without being overused.
About the Name Killian
Killian is a boy name with Irish, French, American, and English origins . The name means "associated with the church" in Irish Gaelic .
Is Killian a boy or girl name? Killian is used as both a boy and girl name. As a boy name, it ranks #370 in popularity. As a girl name, it ranks #9,219. Killian is more commonly used as a boy name.
Killian is currently ranked #370 in popularity for boy names in the United States.
The name Killian has 3 syllables and is pronounced k-IHLY-uhn, making it distinctive and memorable.
Common nicknames for Killian include Killy, Kill, and Ian. These shorter forms provide casual alternatives while keeping the elegance of the full name.
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Sources
- U.S. Social Security Administration — National Baby Names Data (popularity rankings and historical trends)
- Behind the Name (etymology and meaning research)
- NamingEverything editorial research and analysis