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).
Kaitlyn
Kaitlyn is now well below its former popularity. All-time it's been given to 587,923 U.S. babies, the 627th most common name by sound today, peaking at 26,417 in 2000, with 864 in 2025.
By sound, Kaitlyn also includes the spellings Katelyn, Caitlin, Kaitlin, Caitlyn, Katelynn, Kaitlynn, Katelin, Caitlynn, Kaytlin. Spellings sometimes heard the same way: Katlyn, Katlin.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).