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Koji
BoyMeaning of Koji: Japanese: 'second son'
Koji is a boy's name most strongly associated with Japanese naming. It has 4 letters and 2 syllables, and it is familiar but far from overused — 3313th most popular boys' name in the United States in 2025 and 4270th in England & Wales.
US rank 2025
#3313
34 babies in 2025
England & Wales 2024
#4270
4 babies in 2024
US babies since 1880
645
First recorded 1922 · peak 2025
Trend
rising
Style: uncommon
Popularity over time
Gender split
100% boys · 0% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with K
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Irish · 2 syllables
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Scottish · 2 syllables
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American · 2 syllables
US #138UK #250
Arabic & Persian · 2 syllables
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Hebrew · 2 syllables
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Scottish · 2 syllables
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Hawaiian · 1 syllable
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