Cayd is seldom used as a baby name for boys. It is not in the top 1000 names. In 2012, within the group of boy names directly related to Cayd, Cade was the most popular.
Baby names that sound like Cayd include Cade (English), Caid (English), Caide (English), Cayde (English), Kade (English), Kayd, Kayde (English), Quayd, Quayde, Cad, Caed, Caede, Caith, Caithe, Cat, Cathe, Catt, Cayth, Caythe, and Cote.
† approx English pronunciation for Cayd: K as in "key (K.IY)" ; EY as in "ate (EY.T)" ; D as in "day (D.EY)"