Kassi
Feminine
A short form is where a family's paper trail goes to die. Kassi can stand for Cassandra, Cassidy, Kassidy, Katherine or nothing at all, and a hundred years from now nobody reading the record will be able to tell which.
How old is the name Kassi?
Kassi first appears in US birth records in 1966 — 59 years ago. The typical Kassi alive today was born around 1991, making them about 34 years old. About 2,100 people named Kassi are estimated to be alive in the US today.
When was the name Kassi most popular?
Kassi peaked in 1986, reaching #1260 nationally. Today it ranks #10107, 8,847 places below that high. See the whole 1986 chart.
Where it comes from
Origin, sound and short forms
Our story of Kassi
Genealogists know the problem well. A record says Kassi, or Bess, or Nan, or Polly, and the researcher has to guess which formal name stood behind it, because the household name was the only one anybody used and the clerk wrote down what he was told. Polly is Mary, Nan is Ann, Bess is Elizabeth, Sally is Sarah, and none of that is obvious from the letters. Modern American practice makes it worse by registering the short form as the legal name, so there is no longer name hiding behind it at all. Kassi belongs to that stage. It might descend from a Greek prophetess, from an Irish surname, or from a parent liking the sound, and unlike the older cases there is not even a baptismal register to check.
Meaningnot established
Not established
Kassi is a short form with several possible full names behind it: Cassandra, whose own meaning is unsettled; Cassidy, from Irish O Caiside; and occasionally Katherine or Kassandra. It is also registered on its own with no longer form intended. The peak is 1986.
Pronouncing Kassi
KASS-ee
Two syllables, stress on the first. Cassie, Kassie and Kassi are homophones.
Nicknames for Kassi
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
- 1966
- Most girls named
- 1986107 — the highest on record
- Peak rank
- #1260reached in 1986
- Change vs 2024
- −18.2%9 in 2025, from 11
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.
Kassi in other languages
The same name elsewhere
- Cassie in English — spelling variant
- Kassie in English — spelling variant
Kassis among us
people named Kassi are estimated to be alive in the US today
About 1 girl in 178,585 born in 2025 was named Kassi
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kassi
- #10107
- Kassi on the 2025 chart
- #946
- counting every spelling
The SSA counts spellings, not names. Kassi went to 9 girls in 2025, but Cassi is the same name said out loud. Together the 2 spellings went to 14, which makes it the 946th most-given girls’ name of the year — 9,161 places above the chart.
- Kassi9
- Cassi5
About 1 girl in 114,805 born in 2025 was given one of these spellings — against 1 in 178,585 for Kassi 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 Teresia test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kassi's later chapters haven't been written yet, so we borrowed them: Teresia climbed just as high around 1956, and its whole arc is on record. Line the two peaks up, and Teresia's path sketches the road Kassi is walking now.
Kassi 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
Kassi beside its neighbors
The names ranked closest to Kassi in 2025, in babies rather than position — the bars are to scale.
US girls given each name in 2025.
The trade-off
- Two syllables and five letters, nothing silent.
- Several formal names can stand behind it if one is wanted.
- It reads as friendly and unfussy in any setting.
- Cassie is the standard spelling by a wide margin.
- It is a short form with no fixed long name.
- The -i ending dates the spelling to the 1970s and 1980s.
Nobody names a baby alone.
Put Kassi to the vote.
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What they receive
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Kassi
Feminine · #10107 in the U.S.
Frequently asked
- How many Kassis are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 2,100 people named Kassi are estimated to be alive in the US today.
- How do you spell Kassi?
- Kassi is the most-used spelling in US records — 9 of the 14 babies given the name in 2025. The others recorded are Cassi.
- How popular is the name Kassi in 2025?
- Kassi ranks #10107 among US girl names in 2025, with 9 babies given the name.
- How rare is the name Kassi?
- About 1 in every 178,585 US girls born in 2025 was named Kassi — 9 in all.
- Will my child share the name Kassi with classmates?
- Kassi will almost certainly be the only one in school.
Ranked beside Kassi
Names sitting at a similar level of popularity right now.
Berta#10107 · Jettie#10107 · Maye#10107 · Osa#10107 · Fidelia#10107 · Alysa#10107 · Su#10107 · Willie#10107
Looking for what else is popular rather than what resembles Kassi? See the current top 100.
Choosing between Kassi and another name?
See them side by side — full stats, history and a gentle verdict.
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Which one would you pick?
Your gut first, the numbers after — the split shows once you pick.
US figures from the Social Security Administration. 1880–2025. Data & methodology
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