Cailyn
- Pronunciation
- [Cai-lyn]
- Gender
- Female
- Meaning
- Rejoicer.
- Origin
- Celtic
About the Name Cailyn
Cailyn is a modern, melodic name often glossed as "rejoicer" and drawn from the Celtic naming world, where it sits among a wide circle of related forms such as Caitlin, Kaylin, and Kaelyn. Its flowing two-syllable shape, Cai-lyn, blends an airy opening with the popular -lyn ending that flourished across American girls' names in the 2000s, giving it both freshness and a comfortable familiarity. The name balances a soft, lilting sound with a genuinely uplifting meaning.
That balance of softness and contemporary polish is its main draw. Cailyn feels gentle and feminine while reading as fresh rather than fussy, a personalized take on long-loved Celtic sounds that lets it stand a little apart from its more common cousins. For parents who adored Caitlin but wanted something just slightly different, this spelling offered a graceful, of-the-moment alternative with the same lilting charm. The overall effect is bright and graceful, a name that feels happily of its era.
Cailyn first entered the US Social Security top-1000 for girls in 2006 and reached its peak in 2009 at rank #723. It last appeared in the top-1000 in 2012, at rank #985, with roughly 2,261 girls given this spelling across that span — a brief but real presence during the height of the -lyn trend. Recorded variants include Caelan and Calin.
Source: U.S. Social Security Administration name data, 1880–2024 (methodology). By Marvin Tang.
Quick Facts About Cailyn
US Popularity History (2006–2012)
Annual US births named Cailyn by gender, from US Social Security Administration records. Peak year: 2009 with 401 girls named Cailyn (girl rank #723 that year).
Where it stands today: in 2012, ranked #985 for girls (256 US births). That's 262 places below its 2009 peak.
Source: US Social Security Administration. Limitations: US birth-certificate data only; names appearing fewer than 5 times in a given year are suppressed for privacy; spelling variants are counted separately. For names that ranked outside the US top 100 before year 2000, only the years they reached the top 100 are shown — the chart may have gaps for less-popular historical names.
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Variant Forms
Looking for names like Cailyn?
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Compare Cailyn to Other Popular Names
Side-by-side popularity charts and crossover years for Cailyn against today's most popular girls-name peers (top 8 by US births in the last 10 years of SSA records).