Kasey as a Baby Name. Meaning and Origin of Kasey

What is the meaning of the name Kasey ?

The baby name Kasey is a Unisex name , 2 syllables long and is pronounced /ˈkeɪsi/ (KAY-see).

Kasey is Irish in Origin.

Kasey is a modern respelling of Casey, the Anglicized form of the Irish surname Ó Cathasaigh, meaning “descendant of Cathasach.” The Old Irish personal name Cathasach is generally glossed as “vigilant,” “watchful,” or “alert,” a sense that underpins Kasey’s contemporary appeal. As a surname adopted as a given name, it functions comfortably as unisex across English.

Use of Kasey rose in the mid-to-late 20th century in the United States and spread across other English-speaking countries, paralleling a broader trend toward phonetic, K-initial spellings. Parents often choose Kasey to distinguish it from the more traditional Casey while retaining the same sound and heritage. Close variants include Casey, Kacey, Kacie, Kasie, and Kaycee, with rarer spellings such as Kayce and Kasee also seen. The name conveys a bright, accessible style paired with the enduring Irish meaning of being “vigilant” or “on guard.”