Kathylyne \k(a)-thyly-ne, kath(y)-lyne\ as a girl's name is a variant of Kathleen (Irish). See for meaning of Kathylyne.
The baby name Kathylyne sounds like Kathlyne and Kathyline. Other similar baby names are Kathyrine, Kathryne, Kathline, Kathlene, Katheline, Katharyne, Cathlyne, Kathlyn, Katheryne, Katlyne, Kathlynn and Kathaline.