MallowbyNames

Casyn

KAY-sin · Of uncertain origin; likely a modern invented name.

2025 rank (boys)
#5,208
Babies named in 2025
18
Peak popularity
2020
2025 frequency
1 in 94,893 boys
Usually for
Boys
Trend
Declining since 2020

Declining since 2020, #5,208 for boys today.

Popularity of Casyn since 2000

Babies named Casyn per year in U.S. Social Security records.

122335200020102020Most births 2020Boys
Data table (by decade)
DecadeBoys
2000s80
2010s271
2020s159

Meaning & origin

Casyn is a modern American name that first appeared in U.S. birth records around the year 2000. It reached its peak popularity in 2020, ranking 5,208th, with about 1 in every 94,893 boys receiving the name. Since 2020, its usage has been on a downward trajectory. The name has not been concentrated in any particular state, reflecting its widespread but low-frequency use. Casyn fits the trend of names ending in 'syn' or 'son,' which surged in the early 21st century. As a contemporary coinage, it lacks deep historical roots, but its similarity to names like Cason and Kason gives it a familiar sound. Parents drawn to creative spellings and modern-sounding names may find Casyn appealing, though it remains relatively rare.

Casyn is a modern coinage, first recorded in the United States in 2000. It appears to be a creative respelling or variant of names like Cason or Kason, which themselves may derive from the English surname Cason (meaning 'son of Cass'). Its rise in the early 2000s aligns with the trend of names ending in the sound '-son' and '-syn' for boys.

Nicknames & variants

Nicknames: Cas, Casy

Variants: Cason, Kason, Cayson, Kasyn

Sibling names for Casyn

Names that share Casyn's style, for a brother or sister.

A parent animal hugging its little one, the personalized name page

C is for Casyn, our favorite little boy.

C is for Casyn…”

In a Mallowby alphabet book, Casyn's letter becomes Casyn's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Casyn's book

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Questions parents ask

What does the name Casyn mean?
The meaning of Casyn is uncertain; it is considered a modern invented name, possibly a variant of Cason.
How popular is the name Casyn?
In 2025, Casyn ranked 5,208th in the U.S., with about 1 in every 94,893 boys given the name. Its popularity peaked in 2020.
Is Casyn a boy or girl name?
Casyn is primarily used for boys.