Cailyn
- Gender
- Girl
- Say it
- KAY-lin
- Origin
- Modern
- US rank, 2025
- #3,711 for girls
Cailyn is a girls' name of Modern origin. In 2025 it ranked 3,711th for girls in the US (40 babies).
What does Cailyn mean?
Modern: spelling of Kaylin; also suggests Irish cailín, girl
Often seen as a spelling of Kaylin; the similar-sounding Irish word cailín means 'girl'.
Is Cailyn a girl's or a boy's name?
Cailyn is a girls' name. In 2025, it was given to 40 girls and 5 boys in the US.
How popular is Cailyn in the UK?
No girls in the UK were given it in 2025, or too few to be listed. Its busiest year was 2009, with 15 girls.
Half of all the girls named Cailyn in the UK since 1996 were born between 2008 and 2014, the years shaded on the chart below.
Cailyn in the UK, year by year
| Year | Girls | Rank |
|---|---|---|
| 2022 | 1 | #7,487 |
| 2021 | 0 | – |
| 2020 | 0 | – |
| 2019 | 0 | – |
| 2018 | 5 | #4,204 |
| 2017 | 7 | #3,395 |
| 2016 | 9 | #2,893 |
| 2015 | 10 | #2,629 |
| 2014 | 6 | #3,702 |
| 2013 | 2 | #7,600 |
| 2012 | 10 | #2,666 |
| 2011 | 15 | #1,917 |
| 2010 | 14 | #2,004 |
| 2009 | 15 | #1,848 |
| 2008 | 14 | #1,943 |
| 2007 | 10 | #2,354 |
| 2006 | 5 | #3,724 |
| 2005 | 5 | #3,543 |
| 2004 | 3 | #4,789 |
| 2003 | 0 | – |
| 2002 | 1 | #5,540 |
| 2001 | 4 | #3,427 |
| 2000 | 0 | – |
| 1999 | 0 | – |
| 1998 | 1 | #5,152 |
| 1997 | 1 | #5,110 |
| 1996 | 1 | #5,054 |
How popular is Cailyn in the US?
- Rank in 2025
- 3,711th among girls
- Babies in 2025
- 40 about 1 in 40,000 girls
- Five-year trend
- Falling down 32% in five years
- Same name in a class
- under 1% chance among 15 girls
In 2025, 40 girls in the US were named Cailyn, making it the 3,711th most popular name for girls. Five years earlier, in 2020, it was 2,468th. Its busiest year was 2009, with 401 girls. It first appears in the records in 1979. 5 boys were also named Cailyn in 2025 (12,003rd for boys).
It has been given to fewer girls each year for the last 3 years. 2025 had fewer girls named Cailyn than any year since 1991.
Half of all the girls named Cailyn in the US since 1880 were born between 2002 and 2012, the years shaded on the chart below.
In 2025, 1,087 girls in the US were given Cailyn or a name that sounds the same. With every name's spellings counted this way, that ranks #305, up from #3,711 for this spelling alone.
Cailyn in the US, year by year
| Year | Girls | Rank |
|---|---|---|
| 2025 | 40 | #3,711 |
| 2024 | 48 | #3,277 |
| 2023 | 53 | #3,091 |
| 2022 | 65 | #2,661 |
| 2021 | 55 | #3,002 |
| 2020 | 70 | #2,468 |
| 2019 | 70 | #2,508 |
| 2018 | 67 | #2,584 |
| 2017 | 87 | #2,184 |
| 2016 | 114 | #1,815 |
| 2015 | 177 | #1,337 |
| 2014 | 178 | #1,326 |
| 2013 | 219 | #1,111 |
| 2012 | 256 | #985 |
| 2011 | 301 | #868 |
| 2010 | 322 | #835 |
| 2009 | 401 | #724 |
| 2008 | 399 | #742 |
| 2007 | 276 | #974 |
| 2006 | 306 | #869 |
| 2005 | 209 | #1,125 |
| 2004 | 206 | #1,106 |
| 2003 | 186 | #1,159 |
| 2002 | 172 | #1,188 |
| 2001 | 127 | #1,475 |
| 2000 | 163 | #1,215 |
| 1999 | 151 | #1,241 |
| 1998 | 157 | #1,181 |
| 1997 | 129 | #1,332 |
| 1996 | 94 | #1,623 |
| 1995 | 88 | #1,665 |
| 1994 | 77 | #1,836 |
| 1993 | 53 | #2,375 |
| 1992 | 41 | #2,864 |
| 1991 | 23 | #4,323 |
| 1990 | 44 | #2,635 |
| 1989 | 25 | #3,887 |
| 1988 | 27 | #3,478 |
| 1987 | 13 | #5,608 |
| 1986 | 11 | #6,153 |
| 1985 | 18 | #4,280 |
| 1984 | 11 | #5,898 |
| 1983 | 8 | #7,310 |
| 1982 | 7 | #8,222 |
| 1981 | 0 | – |
| 1980 | 0 | – |
| 1979 | 5 | #10,208 |
Names like Cailyn
Names given in the same years and the same naming tradition, with a similar sound.
Caoimhe, Keira, Eden, Cassidy, Aoibheann, Teagan, Brooklyn, Caitlin, Kiara, Eowyn, Ocean, Raegan
Other spellings of Cailyn
Kaylynn, Kaelyn, Kaylin, Kailyn, Kaelynn, Kailynn, Kaylyn, Kaylen, Keylin, Keilyn, Caelyn
Names related to Cailyn
More Modern names
Jayden, Ailany, Myla, Kayden, Nevaeh, Jax, Indie, Miley, Raelynn, Kaiden, Kehlani, Alayna, Caden, Zayden, Wrenley, Mya
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, “Cailyn: name meaning, origin and popularity”, https://www.nameling.co.uk/names/cailyn, updated 20 October 2026.