Catheirn \c(a)-thei-rn\ as a girl's name is a variant of Catherine (Greek), and the meaning of Catheirn is "pure".

The baby name Catheirn sounds like Cathern, Cathrinn, Cathiryn, Cathirin, Catheryn, Catherinn, Catherin and Catheren. Other similar baby names are Cathelin, Kathiryn, Katheryn, Katherin, Catrin, Cathrynn, Cathryn, Cathrine, Cathline, Cathleen, Catherina, Cathenne, Cathelina, Catharin, Kathlin, Kathirin, Catreina and Catreen.