Kaysie
Feminine · “Irish O Cathasaigh”
Kaysie is Casey with three substitutions and the same sound. The C has become a K, the -sey has become -sie, and an extra vowel has appeared, and none of it is audible. It is a useful measure of how far an American respelling can travel while leaving the spoken name exactly where it started.
How old is the name Kaysie?
Kaysie first appears in US birth records in 1972 — 53 years ago. The typical Kaysie alive today was born around 1998, making them about 27 years old. About 1,200 people named Kaysie are estimated to be alive in the US today.
When was the name Kaysie most popular?
Kaysie peaked in 1990, reaching #2258 nationally. Today it ranks #8860, 6,602 places below that high. See the whole 1990 chart.
Lists built from the same records:
Where it comes from
From O Cathasaigh to Kaysie
Our story of Kaysie
Our reading is that counting the substitutions in a respelling is a useful way of seeing how the system works. Each individual change is small and each is a legitimate English spelling of the sound it replaces: C and K both spell a hard k; a and ay both spell a long a before a consonant; -sey, -sie, -sy and -see all spell the same final syllable. Applied one at a time, each looks minor. Applied together, they produce a written form that shares three letters with the original and is pronounced identically. That is the whole mechanism of American respelling in miniature: a name is decomposed into sounds, each sound is respelled from the set of options English provides, and the result is maximally distinct on paper and identical in speech. The cost is a lifetime of spelling it out, which is the trade the system is built on.
Meaningscholars disagree
Irish O Cathasaigh, descendant of the vigilant one
Casey is an Irish surname from O Cathasaigh, containing cathasach, usually read as vigilant or watchful. Kaysie is a respelling substituting K for C, ay for a, and -sie for -sey. None of the three changes the pronunciation. It peaks in 1990.
How the name formed
- O Cathasaigh
- Casey
- Kaysie
Related forms: Casey · Kacie
Pronouncing Kaysie
KAY-see
Two syllables, stress on the first. Kaysie, Casey, Kacie, Kacey and Kasey are all homophones and only the spelling separates them.
Nicknames for Kaysie
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
- 1972
- Most girls named
- 199056 — the highest on record
- Peak rank
- #2258reached in 1990
- Change vs 2024
- +37.5%11 in 2025, from 8
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.
Kaysie in other languages
The same name elsewhere
- Casey in English — spelling variant
- Kacie in English — spelling variant
Kaysies among us
people named Kaysie are estimated to be alive in the US today
About 1 girl in 146,115 born in 2025 was named Kaysie
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kaysie
- #8860
- Kaysie on the 2025 chart
- #917
- counting every spelling
The SSA counts spellings, not names. Kaysie went to 11 girls in 2025, but Kaycie is the same name said out loud. Together the 2 spellings went to 43, which makes it the 917th most-given girls’ name of the year — 7,943 places above the chart.
- Kaycie32
- Kaysie11
About 1 girl in 37,378 born in 2025 was given one of these spellings — against 1 in 146,115 for Kaysie 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 Joaquina test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kaysie's later chapters haven't been written yet, so we borrowed them: Joaquina climbed just as high around 1926, and its whole arc is on record. Line the two peaks up, and Joaquina's path sketches the road Kaysie is walking now.
Kaysie 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
Kaysie beside its neighbors
The names ranked closest to Kaysie in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- The Irish surname behind it has a documented meaning.
- Kay is a clean and established short form.
- The K makes the first consonant unambiguous.
- At least five spellings of the same sound circulate.
- Casey is the standard form and is used for both sexes.
- It will be spelled out letter by letter for life.
Nobody names a baby alone.
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What they receive
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Kaysie
Feminine · #8860 in the U.S.
Frequently asked
- How many Kaysies are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 1,200 people named Kaysie are estimated to be alive in the US today.
- How do you spell Kaysie?
- Kaysie is one of 2 recorded spellings. Kaycie is the more common one — 32 births in 2025 against 11 for Kaysie.
- How popular is the name Kaysie in 2025?
- Kaysie ranks #8860 among US girl names in 2025, with 11 babies given the name.
- How rare is the name Kaysie?
- About 1 in every 146,115 US girls born in 2025 was named Kaysie — 11 in all.
- Will my child share the name Kaysie with classmates?
- Kaysie will almost certainly be the only one in school.
Ranked beside Kaysie
Names sitting at a similar level of popularity right now.
Lida#8860 · Lauretta#8860 · Dot#8860 · Bonita#8860 · Benita#8860 · Trixie#8860 · Adna#8860 · Sue#8860
Looking for what else is popular rather than what resembles Kaysie? See the current top 100.
Choosing between Kaysie and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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