Kassi

Meaning & origin

Kassi is a modern American spelling variation of the Irish-derived name Casey, most often given to girls. It first appeared in U.S. birth records in 1966, but its peak usage came in 1986, when it ranked its highest. Since 1987, its popularity has been steadily falling, though it remains in occasional use. As of 2025, it ranks 10,107 with a frequency of roughly 1 in 178,585 newborn girls. This trajectory mirrors broader trends away from the 'K' variations that were fashionable in the 1980s. Kassi's appeal lies in its simple phonetics and feminine ending, yet its low usage means it is unusual enough to be distinctive.

Kassi is a modern spelling variant of Casey or Kassidy. Casey derives from the Irish Gaelic surname Ó Cathasaigh, meaning 'descendant of Cathasach,' a personal name from 'cathasach' meaning 'vigilant' or 'watchful.' Kassidy emerged as a feminine form of Cassidy, itself from the Irish surname Ó Caiside. Kassi, with an 'i' ending, became popular in the United States during the late 20th century as part of a trend toward simplified, phonetic spellings.