A modern spelling of Kaylee, blending Irish-style sounds with English surname roots.
Cayleigh belongs to a vibrant family of names that trace back to the Gaelic and Irish tradition. Its closest classical ancestors are the Irish Caoilfhinn (meaning "slender and fair") and the broader Gaelic root caol, signifying slenderness or delicacy. Over centuries of anglicization, the original spelling compressed and shifted until Kayley, Kayleigh, and their many variants emerged in English-speaking Ireland and Scotland.
The name gained notable cultural momentum in 1985 when the British rock band Marillion released "Kayleigh" as a single — a heartfelt ballad about lost love that reached number two on the UK charts. The song introduced the name to an entire generation of parents across Britain and Ireland, and its influence can be traced in the naming statistics of the late 1980s and 1990s. That kind of pop-cultural anchoring is rare for a name, and it gave Kayleigh — in all its spellings — a wistful romantic association.
Cayleigh in particular, with its "C" opening and the added "gh" at the close, reads as one of the more elaborately feminine of the family's spellings, popular especially in the United States and Canada from the 1990s onward. It sits comfortably alongside Hailey, Bailey, and similar sound-siblings, but the Celtic ancestry behind the syllables gives it a depth those names don't always carry. Parents drawn to the sound often discover, with pleasure, that they've also chosen something with genuine linguistic heritage.