Declining since 2018, #12,008 for boys today.
Popularity of Castin since 2006
Babies named Castin per year in U.S. Social Security records.
Data table (by decade)
| Decade | Boys |
|---|---|
| 2000s | 23 |
| 2010s | 103 |
| 2020s | 58 |
Meaning & origin
Castin is a modern name that first entered U.S. birth records in 2006, reflecting the trend of creating distinctive yet familiar-sounding names. It never cracked the top 1,000, with its highest rank at 12,008th in 2025, where about 1 in 341,615 newborns received the name. Its trajectory shows a peak in 2017 followed by a steady decline since 2018, suggesting it rose briefly in popularity before falling out of favor. The name is most likely an invented variant of Caston or a respelling inspired by the word 'castle', fitting a pattern of names ending in '-in' that were fashionable in the 2000s. While its origins are not deeply rooted, Castin offers a straightforward and strong sound for parents seeking a contemporary name with a classic feel.
Castin first appears in U.S. records in the 2000s. It may be a modern coinage influenced by names like Caston or the word 'castle', or a respelling of the surname Castine. Its recent emergence and lack of historical usage suggest it is a contemporary creation, possibly formed by blending sounds from popular names.
Nicknames & variants
Nicknames: Cass, Cast
Sibling names for Castin
Names that share Castin's style, for a brother or sister.
