Kaylyn \ka(yl)-yn\ as a girl's name is a variant of Kayla (Irish, Gaelic) and Kaylin (American), and the meaning of Kaylyn is "slim and fair". See also Lynn.

The baby name Kaylyn sounds like Kayelyn, Caylyn, Kaylynn, Kaylen, Kaylan, Kalyn, Kailyn and Kaelyn. Other similar baby names are Karlyn, Kamlyn, Katlyn and Taylyn.