Kacy
Masculine · “Initials read aloud”
Kacy is given to both — 998 boys and 5,049 girls since 1880. See Kacy as a girl nameSee other names given to both
Casey Jones was called Casey after a town. The engineer's name was John Luther Jones, and railroad men called him Casey because he came from Cayce, Kentucky — then he died at the throttle in 1900, a ballad was written, and the nickname became an American given name.
How old is the name Kacy?
Kacy first appears in US birth records in 1962 — 63 years ago. The typical Kacy alive today was born around 1988, making them about 37 years old. About 900 people named Kacy are estimated to be alive in the US today.
When was the name Kacy most popular?
Kacy peaked in 1975, reaching #1505 nationally. Today it ranks #7679, 6,174 places below that high. See the whole 1975 chart.
Lists built from the same records:
Where it comes from
From Cayce to Kacy
The story of Kacy
Jones died on 30 April 1900 near Vaughan, Mississippi, staying with his engine to slow it while his fireman jumped. Wallace Saunders, an engine wiper who had known him, made up a song about it; the song was picked up, rewritten and published in 1909, and became one of the most widely known American ballads. The name entered general use afterwards and is now used for both sexes. That is the full chain: a Kentucky town, a railroad nickname, a fatal accident, a workmate's song, a published hit, and a name. Kacy as a male given name peaks in 1975.
Meaningscholars disagree
Initials read aloud, or Irish "vigilant"
Kacy is either the initials K. C. spelled phonetically or a respelling of Casey. Casey as a surname is from Irish Ó Cathasaigh, from cathasach, vigilant or watchful, from cath, a battle. The engineer's nickname, however, came from the Kentucky town of Cayce, which is itself named for a family. All three routes feed the modern name.
How the name formed
- Cayce
- Casey
- Kacy
Related forms: Casey · Kasey · Ó Cathasaigh
Pronouncing Kacy
KAY-see
Two syllables, stress on the first. Casey, Kasey and Kacy are pronounced identically; the spellings carry no phonetic difference.
Nicknames for Kacy
Moderate
What the data says
146 years of official birth records
The long climb, and where it stands now
The same years in position rather than babies
- First recorded
- 1962
- Most boys named
- 199237 — the highest on record
- Peak rank
- #1505reached in 1975
- Change vs 2024
- 0.0%10 in 2025, from 10
Rank is a position, a count is a headcount, and they move independently — a name can hold its rank while the number of babies behind it falls. Source: U.S. Social Security Administration.
Kacy in other languages
The same name elsewhere
- Casey in English — spelling variant
- Kasey in English — spelling variant
- Ó Cathasaigh in Irish — related form
Kacys among us
people named Kacy are estimated to be alive in the US today
About 1 boy in 170,808 born in 2025 was named Kacy
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kacy
- #7679
- Kacy on the 2025 chart
- #798
- counting every spelling
The SSA counts spellings, not names. Kacy went to 10 boys in 2025, but Khazi, Kazi and Kaci and the rest below are the same name said out loud. Together the 6 spellings went to 130, which makes it the 798th most-given boys’ name of the year — 6,881 places above the chart.
- Khazi51
- Kazi45
- Kaci11
- Kacy10
- Kasi8
- Caasi5
About 1 boy in 13,139 born in 2025 was given one of these spellings — against 1 in 170,808 for Kacy itself.
Spellings are grouped by a fixed rule that folds interchangeable English spellings of one sound (ck/k, ph/f, x/ks, a non-initial y for i) and keeps vowels apart, so Sean and Shawn stay separate names. It errs towards splitting: a family here is never larger than the truth. SSA national data, 2025. Method
Is it right for you
What happens to a name after it peaks
The Manual test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kacy's later chapters haven't been written yet, so we borrowed them: Manual climbed just as high around 1915, and its whole arc is on record. Line the two peaks up, and Manual's path sketches the road Kacy is walking now.
Kacy sits in the calm middle of the cycle — neither chasing a wave nor sliding off one. Middle-of-the-cycle names age slowly and predictably.
A scored estimate from 146 years of naming cycles — not a prophecy. Great names outlive statistics. How this is scored
Kacy beside its neighbors
The names ranked closest to Kacy in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- It is short, phonetic and impossible to mispronounce.
- Kace and KC are ready short forms.
- It works for either sex without adjustment.
- Casey and Kasey are more common spellings.
- It reads as unisex, so it does not signal sex on its own.
- Several unrelated origins feed the same name.
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Kacy
Masculine · #7679 in the U.S.
Frequently asked
- How many Kacys are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 900 people named Kacy are estimated to be alive in the US today.
- How do you spell Kacy?
- Kacy is one of 6 recorded spellings. Khazi is the more common one — 51 births in 2025 against 10 for Kacy.
- How popular is the name Kacy in 2025?
- Kacy ranks #7679 among US boy names in 2025, with 10 babies given the name.
- How rare is the name Kacy?
- About 1 in every 170,808 US boys born in 2025 was named Kacy — 10 in all.
- Will my child share the name Kacy with classmates?
- Kacy will almost certainly be the only one in school.
Ranked beside Kacy
Names sitting at a similar level of popularity right now.
Early#7679 · Obie#7679 · Huston#7679 · Knute#7679 · Rance#7679 · Blain#7679 · Doyle#7679 · Millard#7679
Looking for what else is popular rather than what resembles Kacy? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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