Kasie

Meaning & origin

Kasie first appeared on U.S. baby name records in 1963, a time when the more common spelling Casey was already well established for both boys and girls. The variant Kasie saw its peak popularity in 1987, ranking in the top 4,000 in the early 1990s before entering a steady decline. By 2025, the name was far less common, ranking 10,107th with approximately 1 in 178,585 newborn girls receiving the name. Its trajectory has been falling since 1988. Unlike similar-sounding names such as Kasey or Kacie, Kasie never broke into the top 1,000, and its usage has become quite sparse. The name's Irish heritage gives it a meaningful connection to vigilance and watchfulness, but its creative spelling may appeal to parents seeking a distinctive variant of a familiar name.

Kasie is primarily a variant spelling of Casey, which comes from the Irish Gaelic surname Ó Cathasaigh, meaning 'descendant of Cathasach', a personal name derived from 'cathasach' meaning 'vigilant' or 'watchful'. The name was traditionally used as a surname in Ireland before gaining popularity as a first name in the United States during the 20th century. The spelling Kasie emerged as a modern feminine form, particularly in the latter half of the 1900s.