Karlen \k(a)-rlen, kar-len\ as a girl's name is a variant of Carlene (Old German), Caroline (Old German), Karleen (English) and Karolina (Slavic), and the meaning of Karlen is "free man".

The baby name Karlen sounds like Karlyn, Karlin, Karlene, Karlena, Carlen and Karlein. Other similar baby names are Karlee, Karmen, Karen, Kareen, Karren, Karley, Kaylen, Kalen and Marlen.