Kasyn
Masculine
Kasyn is given to both — 1,413 boys and 250 girls since 1880. See other names given to both
Kasyn is a recent American coinage on the Ka- front and the -syn ending — a spelling choice more than a naming one, and its whole history fits in a decade.
How old is the name Kasyn?
Kasyn first appears in US birth records in 2003 — 22 years ago. The typical Kasyn is a kid of about 8 — this name's wave is very recent. About 1,400 people named Kasyn are estimated to be alive in the US today.
When was the name Kasyn most popular?
Kasyn peaked in 2020, reaching #1579 nationally. Today it ranks #1793, 214 places below that high. See the whole 2020 chart.
Where it comes from
Origin, sound and short forms
Our story of Kasyn
Our story of Kasyn is a story of a sound with half a dozen written faces. Kason, Cason, Kaysen, Kacen, Kasyn — all of them say the same two syllables, and what separates them is only what each family chose to put on paper. Kasyn takes the K and the y, both of them modern signals. It appears in the American registers in the 2010s in small numbers, and there is no older word behind any of the spellings.
Meaningnot established
Not established
No established etymology. The Ka- front circulates from Kayden and Kason; the -syn ending is the English patronymic used as a sound. Neither carries meaning in this compound. Honest sources record it as a modern American coinage.
Pronouncing Kasyn
KAY-sun
Two syllables, stress on the first. All the spellings of the sound are said identically.
Nicknames for Kasyn
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
- 2003
- Most boys named
- 2020103 — the highest on record
- Peak rank
- #1579reached in 2020
- Change vs 2024
- +21.9%89 in 2025, from 73
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.
Kasyn in other languages
The same name elsewhere
- Kason in English — spelling variant
- Kaysen in English — spelling variant
- Cason in English — spelling variant
Strongest US states over the last decade: Texas, Georgia, Louisiana.
Kasyns among us
people named Kasyn are estimated to be alive in the US today
About 1 boy in 19,192 born in 2025 was named Kasyn
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Kasyn
- #1793
- Kasyn on the 2025 chart
- #778
- counting every spelling
The SSA counts spellings, not names. Kasyn went to 89 boys in 2025, but Kacyn, Casyn and Kasin and the rest below are the same name said out loud. Together the 5 spellings went to 150, which makes it the 778th most-given boys’ name of the year — 1,015 places above the chart.
- Kasyn89
- Kacyn22
- Casyn18
- Kasin16
- Kazyn5
About 1 boy in 11,387 born in 2025 was given one of these spellings — against 1 in 19,192 for Kasyn 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 Neftali test
Every popular name lives one long story — a climb, a peak, a slow settling back. Kasyn's later chapters haven't been written yet, so we borrowed them: Neftali climbed just as high around 1997, and its whole arc is on record. Line the two peaks up, and Neftali's path sketches the road Kasyn is walking now.
Kasyn 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
Where Kasyn is headed
Kasyn should hold steady through 2030 — the curve is flat, and flat curves are the most predictable kind.
Medium confidence — fitted on official counts through 2025.
A damped-trend projection of the official birth data — a sketch of momentum, not a promise. Every name's forecast, ranked.
Kasyn beside its neighbors
The names ranked closest to Kasyn in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Kas and Ace are two short forms, both with real use.
- Two clean syllables with no pronunciation risk.
- It belongs to a documented and highly productive naming pattern.
- There is no inherited meaning, and honest sources say so.
- At least five spellings of the sound are in circulation.
- It will need spelling out every single time.
Nobody names a baby alone.
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Kasyn
Masculine · #1793 in the U.S.
Frequently asked
- How many Kasyns are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 1,400 people named Kasyn are estimated to be alive in the US today.
- How do you spell Kasyn?
- Kasyn is the most-used spelling in US records — 89 of the 150 babies given the name in 2025. The others recorded are Kacyn, Casyn, Kasin and Kazyn.
- How popular is the name Kasyn in 2025?
- Kasyn ranks #1793 among US boy names in 2025, with 89 babies given the name.
- How rare is the name Kasyn?
- About 1 in every 19,192 US boys born in 2025 was named Kasyn — 89 in all.
- Will my child share the name Kasyn with classmates?
- Kasyn will almost certainly be the only one in school.
Ranked beside Kasyn
Names sitting at a similar level of popularity right now.
Iman#1793 · Donnie#1793 · Kodi#1793 · Klayton#1793 · Asael#1793 · Rico#1793 · Valentine#1793 · Auden#1793
Looking for what else is popular rather than what resembles Kasyn? See the current top 100.
Choosing between Kasyn and another name?
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US figures from the Social Security Administration. 1880–2025. Data & methodology
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