Caidyn
Masculine
Caidyn is given to both — 830 boys and 440 girls since 1880. See other names given to both
Caidyn spells the Caden sound with a c, an ai and a y — three separate spelling decisions in one six-letter name.
How old is the name Caidyn?
Caidyn first appears in US birth records in 2000 — 25 years ago. The typical Caidyn is a kid of about 12 — this name's wave is very recent. About 800 people named Caidyn are estimated to be alive in the US today.
When was the name Caidyn most popular?
Caidyn peaked in 2011, reaching #2077 nationally. Today it ranks #4396, 2,319 places below that high. See the whole 2011 chart.
Where it comes from
Origin, sound and short forms
Our story of Caidyn
Ours, offered as ours. Each of the three choices here does something: the c reads as more traditional than k, the ai signals a deliberate spelling rather than a default, and the y marks the ending as chosen. English offers several equivalent letters for the same sounds — c and k, ai and ay, i and y — and modern naming has learned to use all of them as signals rather than as sounds. Caidyn is that system used to its full extent.
Meaningnot established
Not established
No source language is established. The name has no attested form earlier than the 1990s in American records, and the Irish and Welsh derivations offered in name lists are not supported.
Pronouncing Caidyn
KAY-din
Two syllables, first stressed. Every spelling of the sound is said the same.
Nicknames for Caidyn
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
- 2000
- Most boys named
- 201164 — the highest on record
- Peak rank
- #2077reached in 2011
- Change vs 2024
- −8.0%23 in 2025, from 25
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.
Caidyn in other languages
The same name elsewhere
- Caden in English — spelling variant
- Caiden in English — spelling variant
Strongest US states over the last decade: Georgia, Florida, Michigan.
Caidyns among us
people named Caidyn are estimated to be alive in the US today
About 1 boy in 74,264 born in 2025 was named Caidyn
Estimated from SSA birth records and published actuarial life tables. Method
Spellings of Caidyn
- #4396
- Caidyn on the 2025 chart
- #806
- counting every spelling
The SSA counts spellings, not names. Caidyn went to 23 boys in 2025, but Kaidyn, Kaydin and Kaydyn are the same name said out loud. Together the 4 spellings went to 122, which makes it the 806th most-given boys’ name of the year — 3,590 places above the chart.
About 1 boy in 14,001 born in 2025 was given one of these spellings — against 1 in 74,264 for Caidyn 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 Sterlin test
Every popular name lives one long story — a climb, a peak, a slow settling back. Caidyn's later chapters haven't been written yet, so we borrowed them: Sterlin climbed just as high around 1947, and its whole arc is on record. Line the two peaks up, and Sterlin's path sketches the road Caidyn is walking now.
Caidyn 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
Caidyn beside its neighbors
The names ranked closest to Caidyn in 2025, in babies rather than position — the bars are to scale.
US boys given each name in 2025.
The trade-off
- Cade and Cai are both complete short forms in their own right.
- Read correctly on sight by every English speaker.
- Six letters and two syllables, quick to write.
- Three unconventional spelling choices in one short name is a great deal to recite.
- Caden and Caiden are both far more common.
- There is no documented meaning.
Nobody names a baby alone.
Put Caidyn to the vote.
Add it to a family vote or a couple’s swipe deck — the other person gets one card, a simple answer and room to say why. No app, no account for them.
Only the people you invite can see your list.
Already decided on Caidyn? Hide it among decoys and let them guess.
What they receive
Someone added a name to your list
Caidyn
Masculine · #4396 in the U.S.
Frequently asked
- How many Caidyns are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 800 people named Caidyn are estimated to be alive in the US today.
- How do you spell Caidyn?
- Caidyn is one of 4 recorded spellings. Kaidyn is the more common one — 67 births in 2025 against 23 for Caidyn.
- How popular is the name Caidyn in 2025?
- Caidyn ranks #4396 among US boy names in 2025, with 23 babies given the name.
- How rare is the name Caidyn?
- About 1 in every 74,264 US boys born in 2025 was named Caidyn — 23 in all.
- Will my child share the name Caidyn with classmates?
- Caidyn will almost certainly be the only one in school.
Ranked beside Caidyn
Names sitting at a similar level of popularity right now.
Odell#4396 · Corwin#4396 · Tennyson#4396 · Marques#4396 · Manu#4396 · Omid#4396 · Zackariah#4396 · Burton#4396
Looking for what else is popular rather than what resembles Caidyn? See the current top 100.
Choosing between Caidyn and another name?
See them side by side — full stats, history and a gentle verdict.
Compare side by sideIn a hurry? Just pick a winner — one tap, no sign-up, and you see how everyone else voted.
Weighing a whole shortlist? Add the rest in the builder, or settle it with a bracket.
Cast your vote
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
No advertising trackers and no data sellinghow we handle your dataindependent and founder-run, about Name Battle