Kaidyn ranked #3678 among U.S. baby names in 2024. Since 1998, 3,980 babies have been named Kaidyn, peaking in 2012 with 278 births. The 2010s were its biggest decade, with 2,225 births. Its use has been declining, down about 34% over the past five years. Kaidyn is given to both girls and boys.