Cailen \ca(i)-len\ as a girl's name is a variant of Caitlin (Old French, Greek), and the meaning of Cailen is "pure".

The baby name Cailen sounds like Cailin, Cailyn, Caileen, Caylen, Calen, Cailene and Callen. Other similar baby names are Caitlen, Carlen and Cailey.