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Koi
UnisexMeaning of Koi: Japanese: 'carp'
Koi is a unisex name most strongly associated with Japanese naming. It has 3 letters and 1 syllable, and it is familiar but far from overused — 1453rd most popular name in the United States in 2025.
US rank 2025
#1453
124 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
1,482
First recorded 1995 · peak 2023
Trend
rising
Style: uncommon
Popularity over time
Gender split
55% boys · 45% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with K
Hawaiian · 1 syllable
US #86UK #72
Irish · 2 syllables
US #228UK #264
Greek · 3 syllables
US #190UK #594
Scottish · 2 syllables
US #307UK #968
American · 2 syllables
US #138UK #250
American · 2 syllables
US #367UK #332
Irish · 2 syllables
US #233UK #181
Greek · 1 syllable
US #194UK #283
English · 3 syllables
US #308UK #1036
Arabic & Persian · 2 syllables
US #395UK #283
Hebrew · 2 syllables
US #310UK #308
Scottish · 2 syllables
US #512UK #651