How to read the band →
Solid line = floor (spellings that unambiguously belong to the group). Shaded band up to the dashed edge = ceiling (the most it could reach if every ambiguous spelling counted here).
Kaylin
Kaylin is now well below its former popularity. All-time it's been given to 142,904 U.S. babies, the 518th most common name by sound today, peaking at 6,437 in 2009, with 1,181 in 2025.
By sound, Kaylin also includes the spellings Kaelyn, Kailyn, Kaylynn, Kaylyn, Kaylen, Kayleen, Kalyn, Kalen, Cailyn, Kaylan, Kaelynn, Kailynn, Cailin, Kalynn, Kaelin, Kalin, Caelan.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).