Deklyn is a rare variant of Declan that peaked in 2015 and has grown less common since.
Deklyn is predominantly a boy name. In 2025 it ranked #3,869 for boy births in the United States (and #8,313 across all names), given to 28 babies. Deklyn was first reported in SSA data in 2001 and peaked in 2015 (74 births).
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 28 | 28 | — | #3,869 |
| 2024 | 28 | 28 | #15,873 | #4,466 |
| 2023 | 43 | 43 | #9,785 | #3,488 |
| 2022 | 60 | 60 | #7,735 | #2,803 |
| 2021 | 64 | 64 | #7,038 | #2,661 |
| 2020 | 73 | 73 | #7,654 | #2,299 |
| 2019 | 78 | 78 | #7,844 | #2,192 |
| 2018 | 86 | 86 | #6,592 | #2,088 |
| 2017 | 70 | 70 | #7,548 | #2,354 |
| 2016 | 73 | 73 | #9,031 | #2,214 |
| 2015 | 87 | 87 | #8,576 | #1,962 |
| 2014 | 72 | 72 | #6,259 | #2,436 |
| 2013 | 57 | 57 | #7,485 | #2,816 |
| 2012 | 44 | 44 | #8,759 | #3,465 |
| 2011 | 45 | 45 | #12,464 | #3,068 |
| 2010 | 12 | 12 | — | #6,777 |
| 2009 | 13 | 13 | — | #6,516 |
| 2008 | 9 | 9 | — | #8,465 |
| 2007 | 6 | 6 | — | #11,262 |
| 2006 | 5 | 5 | — | #12,479 |
| 2005 | 5 | 5 | — | #11,872 |
| 2004 | 6 | 6 | — | #10,277 |
| 2002 | 6 | 6 | — | #9,654 |
| 2001 | 5 | 5 | — | #10,970 |