The name Kyn is a variant of Kin.
Kin is not regularly used as a baby name for boys. It is not listed in the top 1000 names.
Baby names that sound like Kin include Kine, Kyn, Céin, Xián, Kaan (Turkish), Kaene, Kaeson, Kahn, Kaim, Kaime, Kain (German), Kaine (English and Irish), Kam (English), Kame (Japanese), Kan (English), Kanin (English), Kanine, Kaym, Kayme, and Kayn.
† English pronunciation for Kin: K as in "key (K.IY)" ; IH as in "it (IH.T)" ; N as in "knee (N.IY)"