Kailen is a form of the English Kaitlin.
Kailen is not commonly used as a baby girl name. It is not in the top 1000 names.
Baby names that sound like Kailen include Kailan, Kailynn, Kaylon, Cailen, Cailynn, Caylen, Kaelanee, Kaelaney, Kaelanie, Kaelany, Kalion, Kallon, Kallun, Kalon, Kealan, Kealen, Keelen, Keilan, Calen, and Callen.
† approx pronunciation for Kailen: K as in "key (K.IY)" ; EY as in "ate (EY.T)" ; L as in "lay (L.EY)" ; AH as in "mud (M.AH.D)" ; N as in "knee (N.IY)"