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Kai
BoyMeaning of Kai: Hawaiian: 'sea'
Kai is a boy's name most strongly associated with Hawaiian naming. It has 3 letters and 1 syllable, and it is climbing quickly in the charts right now — 86th most popular boys' name in the United States in 2025 and 72nd in England & Wales.
US rank 2025
#86
4,002 babies in 2025
England & Wales 2024
#72
735 babies in 2024
US babies since 1880
78,710
First recorded 1926 · peak 2022
Trend
rising
Style: trending
Popularity over time
Gender split
89% boys · 11% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with K
Irish · 2 syllables
US #228UK #264
Scottish · 2 syllables
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American · 2 syllables
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Arabic & Persian · 2 syllables
US #395UK #283
Hebrew · 2 syllables
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Scottish · 2 syllables
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American · 2 syllables
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Irish · 1 syllable
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Hawaiian · 1 syllable
US #254UK #206
English · 1 syllable
US #685UK #157