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Kacy
GirlMeaning of Kacy: Irish: 'alert' or 'vigilant'
Kacy is a girl's name most strongly associated with Irish naming. It has 4 letters and 2 syllables, and it is a genuinely rare and unique choice — 5347th most popular girls' name in the United States in 2025.
US rank 2025
#5347
22 babies in 2025
England & Wales 2024
—
Fewer than 3 babies or unlisted
US babies since 1880
6,047
First recorded 1956 · peak 1990
Trend
falling
Style: rare
Popularity over time
Gender split
17% boys · 83% girls, based on US, UK and international usage.
Origins & cultures
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Other names starting with K
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American · 2 syllables
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Greek · 1 syllable
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English · 3 syllables
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Arabic & Persian · 3 syllables
US #955UK #143
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Irish · 3 syllables
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Latin · 3 syllables
US #736UK #855
American · 2 syllables
US #209UK #1262