Caydin is not popular as a baby name for boys. It is not in the top 1000 names. Within the group of boy names directly related to Caydin, Cade was the most popular in 2015.
Baby names that sound like Caydin include Cadin, Caidin, Kadin (English and Arabic), Kadyn (English), Kaiden (English), Caden (English), Cadien, Cadiene, Cadmin, Cadmyn, Cadon, Cadyn, Caedin, Caedmin, Caedmyn, Caedyn, Caidan, Caiden (English), Caidmin, and Caidmyn.
† approx English pronunciation for Caydin: K as in "key (K.IY)" ; EY as in "ate (EY.T)" ; D as in "day (D.EY)" ; IH as in "it (IH.T)" ; N as in "knee (N.IY)"