Kayleigh peaked in 2009 and holds 34,212 SSA records. It's the most elaborate spelling of the Kaylee/Kayley family, carrying both Irish roots and a 1985 power ballad that introduced it to an entire generation of American parents. At rank 731, it's in steady post-peak use with a specific audience who loves its distinctive spelling.
Irish Roots of a Modern-Seeming Name
Kayleigh connects to Irish ceilidh (a traditional Celtic social gathering with music and dance) and to the anglicized form Kaylee, which itself may derive from Caoilfhinn, meaning slender and fair. The multiple spellings (Kaylee, Kayley, Kaileigh, Kayleigh) all point back to the same Irish-Gaelic root. Kayleigh with the -leigh ending gives the name a formal, written weight that shorter spellings lack, even though they all sound the same out loud.
Marillion's 1985 Track
"Kayleigh" by Marillion reached number two in the UK and introduced the spelling to a global audience. The song is a melancholic love letter to a lost relationship, giving the name a bittersweet romantic quality in the British and Irish consciousness. In America, the song was less dominant, but it still seeded the spelling in naming awareness. The current generation of parents is further removed from it, which is neither good nor bad: just a fact about how names outlive their pop-culture moments.
The Spelling Explanation Reality
Kayleigh will be written as Kaylee or Kayley by most people on first attempt. The -leigh ending requires active correction in most contexts. That's not a deal-breaker for families who love this spelling; they chose it knowing the tradeoff. But it's one of the more elaborate spellings among the -y and -ey ending names, and the daily navigation is worth considering honestly before committing.