Kierstyn \ki(e)-rst-yn, kier(s)-tyn\ as a girl's name.
The baby name Kierstyn sounds like Kirstyn, Kierstynn, Kierstin and Kiersten. Other similar baby names are Kirstin, Kirsten, Kirsty, Kjerstin, Kirstynn, Kerstin, Kersten and Keerstin.