Kaidyn is an uncommon variant of Kayden that peaked in 2012 and has grown less common since.
Kaidyn is predominantly a boy name. In 2025 it ranked #2,157 among boys (67) and #9,144 among girls (11) — overall #4,211 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 78 | 78 | #9,144 | #2,157 |
| 2024 | 99 | 99 | #7,080 | #1,911 |
| 2023 | 137 | 137 | #7,820 | #1,468 |
| 2022 | 129 | 129 | #5,868 | #1,616 |
| 2021 | 117 | 117 | #6,834 | #1,661 |
| 2020 | 138 | 138 | #5,088 | #1,500 |
| 2019 | 186 | 186 | #4,601 | #1,220 |
| 2018 | 182 | 182 | #3,589 | #1,312 |
| 2017 | 142 | 142 | #3,664 | #1,609 |
| 2016 | 203 | 203 | #3,397 | #1,213 |
| 2015 | 217 | 217 | #2,866 | #1,186 |
| 2014 | 270 | 270 | #2,316 | #1,051 |
| 2013 | 249 | 249 | #2,161 | #1,120 |
| 2012 | 278 | 278 | #2,069 | #1,043 |
| 2011 | 262 | 262 | #1,959 | #1,128 |
| 2010 | 236 | 236 | #2,048 | #1,260 |
| 2009 | 240 | 240 | #1,924 | #1,326 |
| 2008 | 215 | 215 | #2,196 | #1,377 |
| 2007 | 169 | 169 | #2,527 | #1,630 |
| 2006 | 136 | 136 | #2,683 | #1,958 |
| 2005 | 118 | 118 | #2,587 | #2,284 |
| 2004 | 111 | 111 | #2,824 | #2,178 |
| 2003 | 65 | 65 | #4,151 | #2,965 |
| 2002 | 45 | 45 | #5,567 | #3,618 |
| 2001 | 21 | 21 | #8,454 | #7,210 |
| 2000 | 6 | 6 | — | #9,695 |
| 1999 | 6 | 6 | — | #9,293 |
| 1998 | 6 | 6 | #13,203 | — |