Casyn
Casyn was the 5244th most popular name for boys in 2025, given to 18 babies. Its best year was 2020, when it ranked 3214th with 35 babies. Over the last ten years it has moved down 1,441 places. More babies were named Casyn in the 2010s than in any other decade.
Meaning (as Kason) Origin not documented
- Rank in 2025
- #5,244 boys, down 2,030 places since 2020
- Babies in 2025
- 18boys
- Girls and boys
- Almost always a boy’s name2021–2025
- Peak year
- 202035 babies
- Total since 1880
- 536babies recorded
What does the name Casyn mean?
Casyn is a spelling of Kason, pronounced the same way, so it shares Kason's meaning and origin.
Kason is a modern variant of Cason, as Wiktionary notes. Cason is an English surname that Wiktionary explains as a corruption of the place name Cawston in Norfolk, and also an Italian surname from a word for "house". The American first name, recorded since the 2000s, fits the fashion for K- names ending in -son, and no single meaning applies.
How sure is this? Not documented. Modern variant; its source names have different origins.
Related names: Cason, Kasen, Mason.
Sources for this meaning
- Wiktionary, entry 'Kason', Wiktionary (Wikimedia Foundation)
- Wiktionary, entry 'Cason', Wiktionary (Wikimedia Foundation)
- US Social Security Administration, national baby-name data 1880-2025 (usage history only), US Social Security Administration
Casyn popularity since 1880
A few girls are given the name too: 26 since 2012.
| Year | Rank (boys) | Babies (boys) |
|---|---|---|
| 2025 | #5,244 | 18 |
| 2020 | #3,214 | 35 |
| 2010 | #4,385 | 22 |
| 2000 | #10,610 | 5 |
| 1990 | — | — |
| 1980 | — | — |
| 1970 | — | — |
| 1960 | — | — |
| 1950 | — | — |
| 1940 | — | — |
| 1930 | — | — |
| 1920 | — | — |
| 1910 | — | — |
| 1900 | — | — |
| 1890 | — | — |
| 1880 | — | — |
How popular is Casyn, counting every spelling?
Casyn is a spelling of Kason, a name family that ranked #199 for boys in 2025 once every spelling is counted together, compared with #5,244 for Casyn on its own. Together these spellings went to 1,977 boys in 2025.
| Spelling | Babies 2025 | Official rank | Babies 2021–2025 |
|---|---|---|---|
| Kason | 480 | #597 | 2,955 |
| Kasen | 622 | #484 | 2,859 |
| Casen | 293 | #842 | 1,633 |
| Cason | 291 | #846 | 1,589 |
| Kacen | 109 | #1,566 | 467 |
| Kasyn | 89 | #1,799 | 420 |
| Casyn | 18 | #5,244 | 124 |
| Kacyn | 22 | #4,618 | 94 |
| Kasin | 16 | #5,722 | 74 |
| Kasaan | 11 | #7,428 | 45 |
| Kazen | 13 | #6,644 | 32 |
| Kassan | — | — | 30 |
Spellings count together when they sound the same in American English and are used for the same sex; nicknames and forms that sound different (such as Theo and Theodore) are kept apart. How we group spellings.
How many kids will share the name Casyn?
18 of the 3,606,400 babies born in the US in 2025 were named Casyn (0.01 per 1,000 births). For a boy named Casyn born in 2025, the chance that another child with the same name is in a class of 20 children the same age is under 1 in 50. If every grade liked the name as much as the 2025 babies do, only about one elementary school in 465 (of 430 pupils) would have a child named Casyn.
Shares of all registered births (NCHS); classes assumed to be children born the same year. How we estimate this.
How old are people named Casyn?
About 500 people born in the US named Casyn are alive today, with a median age of 10; half are between 6 and 15. That makes Casyn a young name: most people with it are children.
Babies given the name each year (SSA) times the share of that birth year still alive (SSA life tables). Counts people born in the US only. Method.
Casyn by state
How common Casyn was among boys born in each state in 2021–2025. In 50 states fewer than five boys a year got the name, too few for SSA to publish, so those states show as zero.
Names with a similar history
These names rose and fell in step with Casyn: their share of US boys followed the most similar curve since 1880. If you like Casyn, they share its era and feel.
Questions about the name Casyn
How popular is the name Casyn?
Casyn was the 5244th most popular name for boys in 2025, given to 18 babies. Its best year was 2020, when it ranked 3214th with 35 babies. Over the last ten years it has moved down 1,441 places. More babies were named Casyn in the 2010s than in any other decade.
Is Casyn a boy or girl name?
In 2021–2025, almost always a boy’s name given the name Casyn in the US.
Where is Casyn most popular?
In 2021–2025, Casyn was most common in Texas (0.01 per 1,000 boys).