Fun Facts About the Name Cailyn
- More than 5 thousand babies named Cailyn: U.S. records list 5,554 babies given the name Cailyn from 1880 through 2025. Even 5 boys received the name Cailyn - about 1 boy for every 1,110 girls.
What Does the Name Cailyn Mean?
Cailyn is an English name usually explained as a modern spelling of Caitlin, the Irish form of Catherine. Through that line it carries the customary meaning "pure," from the Greek katharos ("clean, pure"). The deeper origin of Catherine is disputed: besides the katharos derivation, some accounts connect the name with the goddess Hekate, so "pure" is a traditional translation rather than a settled fact.
A second reading treats Cailyn as a constructed name rather than a variant of Caitlin: a short first element joined to the ending -lyn, which entered English girls' names through names such as Marilyn and Carolyn. Under that reading the name has no translated meaning; it is a spelling assembled from familiar pieces. The name itself does not show which of the two accounts a given family intended.
Cailyn Name History & Origins
Caitlín is the Irish form of Catherine, formed with the Irish diminutive ending -ín from Caitrín (Catherine). The name was used in Ireland for centuries, and when English speakers adopted it they respelled it in many ways. Caitlin, Kaitlin, Katelyn, and Cailyn are among those spellings.
The Cailyn spelling belongs to a late twentieth-century fashion in English-speaking countries for -yn and -lyn endings on girls' names, seen in forms such as Kaylyn, Ashlyn, and Raelyn. This spelling drops the t of Caitlin and keeps the -lyn ending, which makes the written name look closer to names ending in -lyn than to Catherine's other descendants.
Cailyn is not a form of the Irish word cailín ("girl"), which is pronounced differently and has a separate origin, even though the two can look alike in English spelling.
How Popular is the Name Cailyn?
Cailyn recorded its highest annual U.S. birth count in 2009. Its best rank was #723 in 2009.
U.S. name popularity from 1880-2025, based on SSA data. Rank shows how the name compares with other names - lower numbers mean greater popularity. Births shows how many babies received the name each year.
| Year | Rank | Births | % |
|---|---|---|---|
| 2025 | #3,728 | 40 | 0.0025% |
| 2024 | #3,278 | 48 | 0.0030% |
| 2023 | #3,101 | 53 | 0.0033% |
| 2022 | #2,662 | 65 | 0.0040% |
| 2021 | #3,009 | 55 | 0.0034% |
| 2020 | #2,473 | 70 | 0.0043% |
| 2019 | #2,513 | 70 | 0.0042% |
| 2018 | #2,587 | 67 | 0.0039% |
| 2017 | #2,185 | 87 | 0.0050% |
| 2016 | #1,818 | 114 | 0.0064% |
| 2015 | #1,337 | 177 | 0.0099% |
| 2014 | #1,328 | 178 | 0.0100% |
| 2013 | #1,111 | 219 | 0.0125% |
| 2012 | #985 | 256 | 0.0145% |
| 2011 | #869 | 301 | 0.0171% |
| 2010 | #836 | 322 | 0.0181% |
| 2009 | #723 | 401 | 0.0218% |
| 2008 | #742 | 399 | 0.0211% |
| 2007 | #974 | 276 | 0.0144% |
| 2006 | #870 | 306 | 0.0161% |
| 2005 | #1,125 | 209 | 0.0113% |
| 2004 | #1,107 | 206 | 0.0112% |
| 2003 | #1,161 | 186 | 0.0102% |
| 2002 | #1,189 | 172 | 0.0096% |
| 2001 | #1,477 | 127 | 0.0071% |
| 2000 | #1,219 | 163 | 0.0090% |
| 1999 | #1,245 | 151 | 0.0085% |
| 1998 | #1,185 | 157 | 0.0089% |
| 1997 | #1,336 | 129 | 0.0074% |
| 1996 | #1,626 | 94 | 0.0054% |
| 1995 | #1,674 | 88 | 0.0050% |
| 1994 | #1,841 | 77 | 0.0043% |
| 1993 | #2,385 | 53 | 0.0029% |
| 1992 | #2,876 | 41 | 0.0022% |
| 1991 | #4,356 | 23 | 0.0012% |
| 1990 | #2,649 | 44 | 0.0023% |
| 1989 | #3,908 | 25 | 0.0014% |
| 1988 | #3,493 | 27 | 0.0015% |
| 1987 | #5,639 | 13 | 0.0007% |
| 1986 | #6,215 | 11 | 0.0006% |
| 1985 | #4,299 | 18 | 0.0010% |
| 1984 | #5,944 | 11 | 0.0007% |
| 1983 | #7,397 | 8 | 0.0005% |
| 1982 | #8,336 | 7 | 0.0004% |
| 1979 | #10,394 | 5 | 0.0003% |
| Year | Rank | Births | % |
|---|---|---|---|
| 2025 | #12,347 | 5 | 0.0003% |
Name popularity over more than a century, based on Social Security Administration data. Gaps in the chart indicate years when the name does not appear in the published records.
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How the Name Cailyn Shapes Your Personality and Life?
You are cheerful and friendly, but are apt to have an emotional life. You like to have several lines of effort going at once. You are a good talker and promoter and seldom worry over anything. At times, you can be impatient, and impulsive. You have the ability to bring an idea to completion. You can express yourself joyously and constructively. You might be psychic, but not know it. You are bold, independent, inquisitive and interested in research. You know what you want and why you want it.
You are always looking for a chance to do your own thing, to be your own person, and to have things done your own way.
✦ Cailyn's Deeper Meaning & Tips for Parents Discover Cailyn's symbolic numbers and practical tips for choosing a name that complements your child's birth date.