Caelin
- Gender
- Boy
- Say it
- KAY-lin
- Origin
- Irish
- US rank, 2025
- #12,003 for boys
Caelin is a boys' name of Irish origin, meaning “slender”. In 2025 it ranked 12,003rd for boys in the US (5 babies).
What does Caelin mean?
Irish: anglicised form of Caolán, or a variant of Kaylin
“slender”
Is Caelin a girl's or a boy's name?
Caelin is a boys' name. In 2025, it was given to 5 boys in the US. Too few girls were given it to be listed.
How popular is Caelin in the UK?
No boys in the UK were given it in 2025, or too few to be listed. Its busiest year was 2010, with 4 boys.
Caelin in the UK, year by year
| Year | Boys | Rank |
|---|---|---|
| 2021 | 1 | #6,364 |
| 2020 | 0 | – |
| 2019 | 3 | #4,913 |
| 2018 | 1 | #6,277 |
| 2017 | 1 | #6,312 |
| 2016 | 2 | #6,340 |
| 2015 | 1 | #6,220 |
| 2014 | 2 | #6,114 |
| 2013 | 0 | – |
| 2012 | 0 | – |
| 2011 | 0 | – |
| 2010 | 4 | #4,026 |
| 2009 | 2 | #5,967 |
| 2008 | 2 | #5,878 |
| 2007 | 3 | #4,486 |
| 2006 | 0 | – |
| 2005 | 0 | – |
| 2004 | 0 | – |
| 2003 | 0 | – |
| 2002 | 0 | – |
| 2001 | 1 | #4,138 |
| 2000 | 1 | #4,018 |
| 1999 | 0 | – |
| 1998 | 0 | – |
| 1997 | 1 | #3,857 |
How popular is Caelin in the US?
No girls in the US were given it in 2025, or too few to be listed. Its busiest year was 2003, with 29 girls. It first appears in the records in 1994. 5 boys were also named Caelin in 2025 (12,003rd for boys).
Half of all the girls named Caelin in the US since 1880 were born between 2000 and 2009, the years shaded on the chart below.
In 2010, 50% of the babies named Caelin in the US were girls.
Caelin in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2024 | 5 | #15,288 |
| 2023 | 0 | – |
| 2022 | 0 | – |
| 2021 | 5 | #15,246 |
| 2020 | 0 | – |
| 2019 | 5 | #15,532 |
| 2018 | 0 | – |
| 2017 | 9 | #10,685 |
| 2016 | 9 | #10,855 |
| 2015 | 11 | #9,476 |
| 2014 | 10 | #10,124 |
| 2013 | 8 | #11,964 |
| 2012 | 14 | #8,204 |
| 2011 | 14 | #8,192 |
| 2010 | 17 | #7,214 |
| 2009 | 25 | #5,535 |
| 2008 | 14 | #8,525 |
| 2007 | 28 | #5,095 |
| 2006 | 24 | #5,544 |
| 2005 | 21 | #5,795 |
| 2004 | 23 | #5,373 |
| 2003 | 29 | #4,413 |
| 2002 | 19 | #5,892 |
| 2001 | 24 | #4,829 |
| 2000 | 20 | #5,486 |
| 1999 | 16 | #6,185 |
| 1998 | 13 | #7,099 |
| 1997 | 27 | #4,004 |
| 1996 | 12 | #7,125 |
| 1995 | 13 | #6,636 |
| 1994 | 15 | #5,978 |
Names like Caelin
Names given in the same years and the same naming tradition, with a similar sound.
Aiden Finn Ronan Conan Kian Kayden Conlan Keegan Brody Declan Brayden Caoimhin
Names related to Caelin
Caelan Cailean Caelen Calen Cailen Calin Calihan Calian Celine Celina Caliana Caelyn
More Irish names
Oscar Rowan Rory Maeve Ryan Nolan Quinn Orla Cody Erin Connor Casey Kennedy Callan Lennon Cillian
Sources
Figures from Baby names in England and Wales (Office for National Statistics), Babies' first names (National Records of Scotland), Baby names (Northern Ireland Statistics and Research Agency) and Popular Baby Names (US Social Security Administration). Nameling last updated them on 20 October 2026. How the figures are worked out, and the data to download.
To cite this page: Nameling, “Caelin: name meaning, origin and popularity”, https://www.nameling.co.uk/names/caelin, updated 20 October 2026.