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Killian

“Variant of Cillian — Irish, possibly meaning strife, or from church/monastery” — Irish origin

Boy's name · #417 in the US (2025) · 2020s

Killian has appeared in US records since 1915 — best rank #248 (2017) · 16,219 babies named Killian all-time · 1 in 2,200 boys born in 2025.

Around the world: about 1 in 620 boys in Ireland (2025) · about 1 in 690 boys in N. Ireland (2025) · about 1 in 1,000 boys in Puerto Rico (2025).

Appears in 2020-2025 birth records of 44 states. See the full state-by-state map on this page.

Famous Killians

• Killian Hayes — French-American basketball player (born 2001)
• Killian Scott — Irish actor
• Killian Sardella — Belgian footballer born 2002
• Killian Overmeire — Belgian footballer
• Killian Peier — Swiss ski jumper

In stories & tradition

• Killian Jones — Once Upon a Time

What Killians become

Among 71 notable people named Killian:

Athletes appear 3.15× more often than among typical names — e.g. Killian Hayes, French-American basketball player (born 2001).

Browse more boy names — popularity, trends and eras for 5,700+ American names, free.

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