Kayley f
Irish and English: of recent origin and uncertain derivation. Kayley is an Irish surname, an Anglicized form of Gaelic Ó Caollaidhe ‘descendant of Caolladhe’, an old male personal name derived from the element caol slender. Its adoption as a modern given name has probably also been influenced by the popularity of the names KELLY (SEE Kelly) and KYLIE (SEE Kylie).
Variants: Kayly, Kaley, Ka(y)leigh.
First names dictionary. 2012.