Derived from Casey, meaning watchful or vigilant
Kacyn is a modern creative spelling of the Irish surname Casey. It likely stems from the Gaelic name Cathasaigh, which translates to watchful or vigilant. This specific spelling variation is a 21st-century American invention, following the trend of replacing vowels with 'y'.
Less common today
Kacyn isn't in the latest US Top 1000. It last peaked at #4,218 in 2018.
US births per 5-year period, 1990–present (SSA data).
