Kerwyn \k(e)-rw-yn\ as a boy's name is a variant of Kerwin (Irish), and the meaning of Kerwyn is "little dark one".

The baby name Kerwyn sounds like Carwyn, Caerwyn, Corwyn, Garwyn, Kern, Kirwen, Kirwan and Kerwinn. Other similar baby names are Berwyn, Derwyn, Kelwyn, Kervyn and Merwyn.