Killian
Killian: name meaning, origin and popularity
Meaning and origin of Killian
- A male given name from Irish.
Etymology
An anglicized spelling of Irish Cillian.
How popular is Killian?
Since 1880, 615 girls and 16,219 boys in the U.S. have been named Killian (4% girls). Its highest rank for girls was #3498 in 1997. Its highest rank for boys was #248 in 2017. In 2025 it ranked #418 for boys, with 785 babies given the name.
Names similar to Killian
Names that start with the same letters, most popular first.
More Irish boy names
Sibling name ideas for Killian
Sister and brother names that share Killian's Irish roots and are still in the U.S. top 1,000.
Killian FAQ
What does the name Killian mean?
A male given name from Irish. An anglicized spelling of Irish Cillian.
What is the origin of the name Killian?
Killian is listed as a name of Irish origin.
How popular is the name Killian?
Since 1880, 615 girls and 16,219 boys in the U.S. have been named Killian (4% girls). Its highest rank for girls was #3498 in 1997. Its highest rank for boys was #248 in 2017. In 2025 it ranked #418 for boys, with 785 babies given the name.
Is Killian a boy or girl name?
Killian is mostly a boy name in the U.S.: 615 girls and 16,219 boys since 1880.
Popularity data: U.S. Social Security Administration baby name data, 1880–2025 (names given to 5+ babies per year). Origin and etymology text: Wiktionary, available under CC BY-SA 4.0.