Kaithlyn is a rare variant of Kathlyn that peaked in 2002 and has grown less common since.
Kaithlyn is a girl name. In 2025 it ranked #14,014 for girl births in the United States (and #23,335 across all names), given to 6 babies. Kaithlyn first appears in 1985 and peaked in 2002 (21 births).
| Year | U.S. births | U.S. + territories | Rank |
|---|---|---|---|
| 2025 | 6 | 6 | #14,014 |
| 2024 | 7 | 7 | #12,765 |
| 2023 | 8 | 8 | #11,676 |
| 2021 | 6 | 6 | #14,314 |
| 2020 | 6 | 6 | #14,241 |
| 2019 | 6 | 6 | #14,634 |
| 2018 | 5 | 5 | #16,822 |
| 2017 | 10 | 10 | #10,319 |
| 2016 | 8 | 8 | #12,287 |
| 2015 | 11 | 11 | #9,784 |
| 2014 | 17 | 17 | #7,141 |
| 2013 | 14 | 14 | #8,341 |
| 2012 | 14 | 14 | #8,418 |
| 2011 | 10 | 10 | #10,756 |
| 2010 | 11 | 11 | #10,105 |
| 2009 | 20 | 20 | #6,681 |
| 2008 | 17 | 17 | #7,563 |
| 2007 | 16 | 16 | #7,901 |
| 2006 | 15 | 15 | #8,046 |
| 2005 | 18 | 18 | #6,665 |
| 2004 | 17 | 17 | #6,932 |
| 2003 | 21 | 21 | #5,687 |
| 2002 | 21 | 21 | #5,568 |
| 2001 | 14 | 14 | #7,511 |
| 2000 | 11 | 11 | #8,852 |
| 1998 | 9 | 9 | #9,668 |
| 1997 | 6 | — | #12,844 |
| 1996 | 5 | — | #14,548 |
| 1995 | 9 | — | #9,102 |
| 1994 | 7 | — | #11,087 |
| 1993 | 6 | — | #12,533 |
| 1992 | 12 | — | #7,249 |
| 1990 | 8 | — | #9,660 |
| 1988 | 5 | — | #12,694 |
| 1986 | 7 | — | #8,962 |
| 1985 | 6 | — | #9,868 |