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Killian
BoyMeaning of Killian: Irish: 'little church'
Killian is a boy's name most strongly associated with Irish naming. It has 7 letters and 2 syllables, and it is one of today's most-chosen names — 419th most popular boys' name in the United States in 2025 and 638th in England & Wales.
US rank 2025
#419
785 babies in 2025
England & Wales 2024
#638
59 babies in 2024
US babies since 1880
16,834
First recorded 1915 · peak 2017
Trend
falling
Style: popular
Popularity over time
Gender split
96% boys · 4% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with K
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Scottish · 2 syllables
US #307UK #968
American · 2 syllables
US #138UK #250
Arabic & Persian · 2 syllables
US #395UK #283
Hebrew · 2 syllables
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American · 2 syllables
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Irish · 2 syllables
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American · 2 syllables
US #231UK #230
Irish · 1 syllable
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Hawaiian · 1 syllable
US #254UK #206