Kayelyn is of American origin, derived from Irish Gaelic roots. It means "slender" or "fair haired". This unique name has gained popularity in recent years due to its distinct sound and spelling, setting it apart from more common names. The name Kayelyn lends itself well to various nicknames such as Kay, Lyn, or Keeley, offering flexibility for those who prefer a shorter form of the name.
The name Kayelyn saw its popularity peak around the late 1990s to early 2000s with a total of 289 babies given this name between 1986 and 2018.