Caisyn
A masculine name of Irish origin meaning "victorious" or "descendent of the chieftain".
Name Census estimates that about 224 living Americans carry the first name Caisyn. It appears on both sides of the gender split, with 71.7% of registrations being male. The average person named Caisyn today is around 6 years old, and the year with the single highest number of Caisyn births was 2023 (41 babies).
This page is the full Name Census profile for Caisyn. Below you will find a gender breakdown showing how the name splits between male and female registrations, a year-by-year popularity chart stretching back to 1880, decade-level totals, the top US states for this name, its meaning and etymology, and a set of frequently asked questions with data-backed answers.
People living today
224
~ 1 in 1,530,153 Americans
Peak year
2023
41 babies that year
Average age
6
years old
2024 SSA rank
#4,575
Tracked since 2011
Gender
Gender distribution for Caisyn
Caisyn is one of the more evenly split names in the SSA data. Of the 226 total registrations, 162 (71.7%) were male and 64 (28.3%) were female.
Caisyn as a male name
- Ranked #4,575 in 2024
- 22 male births in 2024
- Peak: 2023 (31 births)
Caisyn as a female name
- Ranked #13,743 in 2024
- 6 female births in 2024
- Peak: 2019 (11 births)
Popularity
Caisyn: popularity over time
The SSA tracks Caisyn from the 2010s through to the 2020s, spanning 2 decades of birth certificate data. The biggest single decade for the name was the 2020s, with 138 total registrations. The name continues to be given at rates close to its all-time high, suggesting it has not yet fallen out of fashion.
Babies born per year
Decades
Caisyn by decade
The table below breaks the full SSA timeline into ten-year windows. Each row shows how many male and female babies were given the name Caisyn during that decade, along with a combined total. This is useful for spotting eras where the name surged or retreated.
Geography
Where Caisyns live
Origin
Meaning and history of Caisyn
The name Caisyn has its origins in the ancient Celtic culture, believed to have emerged around the 6th century BCE in regions that now encompass parts of modern-day Ireland, Scotland, and Wales. It is derived from the old Celtic words "cais" meaning "brave" and "yn" meaning "one," thus signifying "the brave one."
Caisyn was a relatively uncommon name during the early medieval period, but it gained prominence in Irish folklore and literature. One of the earliest recorded mentions of the name can be found in the ancient Irish saga "Táin Bó Cuailnge," which dates back to the 8th century CE. In this epic tale, Caisyn is portrayed as a fearless warrior who fought alongside the legendary hero Cú Chulainn.
During the Middle Ages, the name Caisyn was associated with several notable figures. One such individual was Caisyn mac Scandlán, a 9th-century Irish king who ruled over the Kingdom of Dál Riata, which spanned parts of modern-day Scotland and Northern Ireland. Another prominent bearer of the name was Caisyn of Iona (1020-1093), a Scottish monk and scholar who played a significant role in preserving and transcribing ancient Celtic manuscripts.
As the centuries passed, the name Caisyn became increasingly rare, but it continued to appear sporadically throughout history. In the 16th century, Caisyn O'Donnell (1515-1581) was a renowned Irish chieftain and military leader who fought against English colonization efforts in Ulster. Later, in the 18th century, Caisyn MacLeod (1745-1820) was a Scottish Gaelic poet and bard renowned for his lyrical works celebrating Highland culture and traditions.
One of the most famous bearers of the name Caisyn in modern times was Caisyn Gilmore (1917-1988), an American actor and singer who gained popularity during the Golden Age of Hollywood. He starred in numerous films throughout the 1940s and 1950s, including classics such as "The Maltese Falcon" and "Casablanca."
While the name Caisyn has become increasingly uncommon in recent decades, it remains a significant part of Celtic cultural heritage, serving as a reminder of the bravery and resilience of the ancient Celtic peoples.
People
Caisyn + last name combinations
How many people share a full name with Caisyn as the first name? Click a combination below to see the estimate, or search any pairing.
Related
Other names starting with C
Other first names starting with C with a similar number of bearers.
FAQ
Caisyn: questions and answers
How many people in the U.S. are named Caisyn?
Name Census puts the figure at roughly 224 living Americans. We arrive at this by taking every SSA birth registration for Caisyn going back to 1880 and adjusting each cohort for expected survival using CDC actuarial life tables. The result is an age-weighted living-bearer count, not a raw birth total. That works out to about 1 in 1,530,153 US residents.
Is Caisyn a common name?
We classify Caisyn as "Very Rare". It ranks above 75.6% of all first names in the SSA dataset by living bearers. Across the full history of the data, 226 babies have been registered with this name.
When was Caisyn most popular?
The single biggest year for Caisyn was 2023, when 41 babies received the name. The fact that the average living Caisyn is about 6 years old gives you a rough sense of which era contributed the most bearers who are still alive today.
What does the SSA popularity chart show?
The chart tracks births, not the number of people alive with the name today. Each point shows how many babies were given the name Caisyn in that year. That makes it useful for spotting when the name rose, peaked, or faded.
Is Caisyn a male name?
Yes, 71.7% of people registered as Caisyn in the SSA data are male. You can see the full per-sex comparison in the gender distribution section above, which includes the latest year rank, birth count, and peak year for each sex.
Is Caisyn still being used today?
Yes. The SSA still recorded Caisyn in 2024, and the page above shows its latest-year rank where available. A name can be well past its peak and still remain in steady use, especially if it built up a large population over earlier decades.
Why can a name have a lot of living bearers even if it is not trendy now?
Because living-bearer counts and current baby-name popularity measure different things. A name like Caisyn can build up a very large population over many decades, even if fewer parents are choosing it now than they did at its peak.
Where does this data come from?
First-name figures come from the Social Security Administration's national baby name files, which cover every name on a birth certificate from 1880 to 2024. Living-bearer estimates layer in CDC actuarial life tables broken out by sex to account for mortality. The population baseline (342,754,338) is the Census Bureau's latest national estimate. You can read the full calculation on our methodology page.
Does every first name have Census demographic data?
No. The public Census first-name release only covers names that met the Bureau's publication rules, so many rarer names in the SSA files do not have a published Census demographic snapshot. In those cases, the page still shows the SSA trend, gender history, and state data.
How many people are called Caisyn?
You can see how many Americans are named Caisyn on our sister site HowManyOfMe.org — same data roots, lighter UI.