Cassidi
Feminine
Cassidi is an Irish surname spelled the American way, and the surname reached most Americans through a film about two men robbing trains.
How old is the name Cassidi?
Cassidi first appears in US birth records in 1977 — 48 years ago. The typical Cassidi alive today was born around 1999, making them about 26 years old. About 900 people named Cassidi are estimated to be alive in the US today.
When was the name Cassidi most popular?
Cassidi peaked in 1999, reaching #2703 nationally. See the whole 1999 chart.
Lists built from the same records:
Where it comes from
Origin, sound and short forms
Our story of Cassidi
The surname was not a first name in America until a film made it one. A western released at the end of the sixties, about two likable outlaws and a long chase, put it in front of an enormous audience attached to a character everybody liked, and the given-name use begins within a few years and rises for two decades. That is the standard shape for a surname crossing over: not a slow drift but a single visible bearer, real or invented, and a jump. The ending is where American parents put their mark — a bare i, which dates the spelling to a particular decade as reliably as a postmark.
Meaningnot established
Not established
The Irish surname it comes from is a family name from Fermanagh, and the usual reading of it refers to curly hair. As a first name it carries no meaning of its own — a surname given to a child is pointing at a family rather than saying anything.
Pronouncing Cassidi
KASS-ih-dee
Three syllables, stress at the front. Identical to Cassidy.
Nicknames for Cassidi
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
- 1977
- Most girls named
- 199951 — the highest on record
- Peak rank
- #2703reached in 1999
- Change vs 2019
- +20.0%12 in 2020, from 10
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.
Cassidi in other languages
The same name elsewhere
- Ó Caiside in Irish — related form
Cassidis among us
people named Cassidi are estimated to be alive in the US today
Estimated from SSA birth records and published actuarial life tables. Method
Is it right for you
Questions parents actually ask
Fashion outlook
Cassidi sits outside the current charts, and that is its own kind of answer: naming cycles can only date the names they carried up. A name this rare has no decade stamped on it — it cannot go out of fashion, because it was never in.
Based on 146 years of naming cycles. How we read them
The trade-off
- It is read correctly on sight with nothing difficult in it.
- It works for either child without reading as borrowed.
- It shortens to a short form that stands alone.
- Cassidy is the standard spelling and hers will be corrected to it.
- The bare i ending dates the spelling precisely.
- It is somebody else's family name, which is the trade every surname name makes.
Nobody names a baby alone.
Put Cassidi 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 Cassidi? Hide it among decoys and let them guess.
What they receive
Someone added a name to your list
Cassidi
Feminine
Frequently asked
- How many Cassidis are there in the world?
- No country counts the world's names, so there is no worldwide figure — anyone quoting one is estimating. About 900 people named Cassidi are estimated to be alive in the US today.
- How popular is the name Cassidi in 2025?
- Cassidi is rarely given in the US today — it does not rank in the top 2000 girl names.
- Will my child share the name Cassidi with classmates?
- Cassidi will almost certainly be the only one in school.
More C names
The most-given names starting with C, all years combined.
Carol#2239 · Cynthia#1013 · Catherine#313 · Christine#1272 · Carolyn#1222 · Christina#770 · Charlotte#2 · Cheryl#4352
Looking for what else is popular rather than what resembles Cassidi? See the current top 100.
Choosing between Cassidi 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