Kaydyn is a rare variant of Kayden that peaked in 2009 and has since faded.
Kaydyn is predominantly a boy name. In 2025 it ranked #8,590 for boy births in the United States (and #17,807 across all names), given to 9 babies. Kaydyn first appears in 2000 and peaked in 2009 (29 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 9 | 9 | — | #8,590 |
| 2024 | 9 | 9 | — | #8,670 |
| 2023 | 13 | 13 | — | #6,720 |
| 2022 | 15 | 15 | — | #6,010 |
| 2021 | 14 | 14 | — | #6,187 |
| 2020 | 16 | 16 | — | #5,578 |
| 2019 | 20 | 20 | #16,773 | #5,966 |
| 2018 | 19 | 19 | #16,885 | #6,175 |
| 2017 | 31 | 31 | #9,058 | #5,026 |
| 2016 | 35 | 35 | #7,424 | #5,047 |
| 2015 | 32 | 32 | #12,407 | #4,232 |
| 2014 | 35 | 35 | #10,541 | #4,075 |
| 2013 | 26 | 26 | #10,624 | #5,534 |
| 2012 | 34 | 34 | #8,889 | #4,610 |
| 2011 | 37 | 37 | #6,041 | #5,824 |
| 2010 | 35 | 35 | #7,358 | #5,141 |
| 2009 | 53 | 53 | #5,796 | #3,686 |
| 2008 | 48 | 48 | #6,035 | #4,090 |
| 2007 | 32 | 32 | #6,691 | #6,865 |
| 2006 | 15 | 15 | #8,050 | — |
| 2005 | 23 | 23 | #10,526 | #6,048 |
| 2004 | 8 | 8 | #12,179 | — |
| 2003 | 5 | 5 | — | #11,852 |
| 2002 | 5 | 5 | #16,773 | — |
| 2000 | 5 | 5 | #16,276 | — |