Meaning and name origin
Cadyn \c(a)-dyn, cad-yn\ as a boy's name is of Scottish origin, and the meaning of Cadyn is "son of Cadán". Cadyn is a variant of Caden (Scottish): from the Scottish surname McCadden. A name for baby boys which is not usually used.
Cadyn is not a popular first name for males and an equally uncommon surname or last name for all people (Source: 2000 U.S. Population Census).
Displayed below is a comparison of the popularity of the boy name Cadyn and its variant forms. Popular variation forms ranked in the Top 1000/100 are Kaden (#171), Cayden (#197), Caden (#198), Kaeden (#896), Kadin and Kadyn. (Source: 2014 Birth Name Statistics).
Cadyn is also pronounced similarly to Caidan, Caiden▲, Caidin, Caidon, Caydan, Caydin, Caydon, Kadan and Kadon. Another suggested similar baby name is Cadmo. Like Cadyn, these names are not commonly used.