MallowbyNames

Kastin

KAS-tin · Of uncertain origin; possibly a variant of Justin or a modern invention influenced by similar-sounding names.

2025 rank (boys)
#8,910
Babies named in 2025
8
Peak popularity
2018
2025 frequency
1 in 213,510 boys
Usually for
Boys
Trend
Declining since 2015

Declining since 2015, #8,910 for boys today.

Popularity of Kastin since 2000

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

4812200020102020Most births 2015Boys
Data table (by decade)
DecadeBoys
2000s13
2010s76
2020s41

Meaning & origin

Kastin is a modern American name that first appeared on the U.S. baby name charts in 2000, a time when inventive and phonetic spellings of traditional names were gaining traction. Its popularity peaked in 2018, after which it experienced a decline, aligning with the broader trajectory of many -in ending names. While Kastin has not been recorded among the top names in any state, its rarity adds to its appeal for parents seeking an uncommon choice. The name's similarity to Justin suggests a possible derivation, though no direct linguistic connection is established. Kastin represents a contemporary naming pattern where distinctiveness is valued over historical depth.

Kastin is a modern name that first appeared in U.S. records in 2000. It may have been formed by blending the popular suffix '-in' with the consonant cluster 'Kast-' derived from names like Justin or Castin. Its exact derivation is uncertain, as it does not have deep historical roots in any established naming tradition.

Nicknames & variants

Nicknames: Kast, Kas

Variants: Castin

Sibling names for Kastin

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

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

K is for Kastin, our favorite little boy.

K is for Kastin…”

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

Make Kastin's book

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Questions parents ask

What does the name Kastin mean?
The meaning of Kastin is uncertain. It is a modern name, possibly a variant of Justin or an invented combination of sounds.
How popular is the name Kastin?
As of 2025, Kastin ranked 8,910th in the U.S., with about 1 in 213,510 boys given the name that year. Its peak popularity was in 2018.
Is Kastin a boy's name or a girl's name?
Kastin is primarily used as a boy's name, as indicated by its U.S. Social Security data.