Kassidi
Feminine · “Irish "descendant of Caiside”
Kassidi applies three separate respelling devices to one Irish surname. C becomes K, the doubled s stays, and the final -y becomes -i. None of them changes the sound. Together they move the name as far from Cassidy as the alphabet allows while leaving it identical in the mouth.
How old is the name Kassidi?
Kassidi first appears in US birth records in 1983 — 42 years ago. The typical Kassidi alive today was born around 2005, making them about 20 years old. About 1,200 people named Kassidi are estimated to be alive in the US today.
When was the name Kassidi most popular?
Kassidi peaked in 1998, reaching #2307 nationally. Today it ranks #7133, 4,826 places below that high. See the whole 1998 chart.
Lists built from the same records:
Where it comes from
From cas to Kassidi
The story of Kassidi
Cassidy entered American given-name use for girls in the 1980s, helped by a television character, and became a top-hundred name in the 1990s. Every large name generates spellings, and Cassidy generated an unusual number because each of its three variable points could be changed independently: C or K, one s or two, -y or -i or -ie. Kassidy, Cassidi, Kassidi and Kassady are all in the data. Kassidi peaked in 1998, which puts it in the second wave — the spellings that arrive once the plain form is common enough to feel unremarkable.
Meaning
Irish "descendant of Caiside", from a word for curly-haired
From Ó Caiside, an Irish surname; cas means curly or twisted, and Caiside is a personal name formed from it, so the family is the descendants of a curly-haired man. The Ó Caiside were hereditary physicians to the Maguires in Fermanagh. The etymology is well documented; nothing in the respelling touches it.
How the name formed
- cas
- Caiside
- Ó Caiside
- Cassidy
- Kassidi
Related forms: Ó Caiside · Cassidy
Pronouncing Kassidi
KASS-ih-dee
Three syllables with the stress on the first and the middle vowel fully reduced. Identical to Cassidy — the K, the doubled s and the final i are all visual.
Nicknames for Kassidi
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
- 1983
- Most girls named
- 199861 — the highest on record
- Peak rank
- #2307reached in 1998
- Change vs 2024
- −28.6%15 in 2025, from 21
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.
Kassidi in other languages
The same name elsewhere
- Ó Caiside in Irish — same name
- Cassidy in English — spelling variant
Strongest US states over the last decade: Georgia, California, Alabama.
Kassidis among us
people named Kassidi are estimated to be alive in the US today
About 1 girl in 107,151 born in 2025 was named Kassidi
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kassidi
- #7133
- Kassidi on the 2025 chart
- #367
- counting every spelling
The SSA counts spellings, not names. Kassidi went to 15 girls in 2025, but Cassidy and Kassidy are the same name said out loud. Together the 3 spellings went to 813, which makes it the 367th most-given girls’ name of the year — 6,766 places above the chart.
About 1 girl in 1,977 born in 2025 was given one of these spellings — against 1 in 107,151 for Kassidi 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 Ilena test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kassidi's later chapters haven't been written yet, so we borrowed them: Ilena climbed just as high around 1931, and its whole arc is on record. Line the two peaks up, and Ilena's path sketches the road Kassidi is walking now.
Kassidi 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
Kassidi beside its neighbors
The names ranked closest to Kassidi 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 is genuine and documented, with a real historical family.
- Kass and Kassie are both established short forms.
- The sound is completely familiar despite the spelling being rare.
- Every letter of the spelling has to be dictated, every time.
- Cassidy is far more common and will be written by default.
- The late-1990s peak dates it clearly.
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Kassidi
Feminine · #7133 in the U.S.
Frequently asked
- How many Kassidis 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 Kassidi are estimated to be alive in the US today.
- How do you spell Kassidi?
- Kassidi is one of 3 recorded spellings. Cassidy is the more common one — 558 births in 2025 against 15 for Kassidi.
- How popular is the name Kassidi in 2025?
- Kassidi ranks #7133 among US girl names in 2025, with 15 babies given the name.
- How rare is the name Kassidi?
- About 1 in every 107,151 US girls born in 2025 was named Kassidi — 15 in all.
- Will my child share the name Kassidi with classmates?
- Kassidi will almost certainly be the only one in school.
Ranked beside Kassidi
Names sitting at a similar level of popularity right now.
Pennie#7133 · Zina#7133 · Elzie#7133 · Rosabel#7133 · Adelene#7133 · Cruz#7133 · Kansas#7133 · Ione#7133
Looking for what else is popular rather than what resembles Kassidi? See the current top 100.
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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