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).
Kayla
Kayla is now well below its former popularity. All-time it's been given to 402,735 U.S. babies, the 469th most common name by sound today, peaking at 20,316 in 1991, with 1,480 in 2025.
By sound, Kayla also includes the spellings Kaila, Cayla, Keyla, Keila, Kaylah, Kaela. Spellings sometimes heard the same way: Kala.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).