Cathiryn \c(a)-thir-yn, cath(i)-ryn\ as a girl's name is a variant of Catherine (Greek) and Katherine (Greek), and the meaning of Cathiryn is "pure".

The baby name Cathiryn sounds like Kathiryn, Cathryn, Cathirin and Catheryn. Other similar baby names are Kathryn, Katheryn, Katharyn, Cathrynn, Cathryne, Cathern, Catherin, Catheren, Catheirn, Catharyne, Catharin, Kathirynn, Kathirin and Catharyna.