Kacey is a spelling variant of Casey — the Irish-origin name that has spent decades being used for both boys and girls with easy confidence. This particular spelling, with the K and -ey combination, peaked in 1991 and sits at just under 12,000 SSA records — making it the less-traveled road in the Casey family, which has real appeal for parents who love the sound but want the name to feel slightly their own.
The Irish Root Shared by All Spellings
Whether spelled Casey, Kasey, Kacey, or Kacie, the name traces to the Irish surname Cathasaigh, derived from the Irish word cath meaning "battle" or "vigilance." It entered American use as a given name in the late 19th century, partly through the legend of railroad engineer Casey Jones, and has been used across genders ever since. The -ey spelling is specifically feminine in most American contexts, tilting the name decisively toward the girls' side of the ledger.
The Country Music Boost
Singer-songwriter Kacey Musgraves — whose debut album Same Trailer Different Park won the Grammy for Best Country Album in 2014, followed by the crossover success of Golden Hour , is the most prominent contemporary bearer of this exact spelling. Musgraves' artistic identity as an independent, genre-defying voice has made the Kacey spelling feel distinctly modern and culturally aware. Whether or not you follow country music, that's a meaningful pop-culture anchor for this particular orthography.
The Nickname Question
Kacey is already short enough to function as both formal name and nickname simultaneously, which is either efficient or limiting depending on your perspective. Some families use K or Kay informally. The name pairs well with longer middle names , Kacey Elizabeth, Kacey Josephine , that provide formal weight when needed. See how it compares to Casey in spelling and feel.
The Counter-Reading: The Spelling Carousel
Kacey's main practical challenge is that every official form will default to Casey. Correcting spelling throughout a lifetime is a minor but real friction. The K spelling does have clear Kacey Musgraves association going for it, which provides at least one memorable reference point. Still, if spelling simplicity matters, the standard Casey handles the same sound without the paperwork correction.