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).
Kylie
Kylie is now well below its former popularity. All-time it's been given to 213,646 U.S. babies, the 368th most common name by sound today, peaking at 9,771 in 2008, with 2,048 in 2025.
By sound, Kylie also includes the spellings Kylee, Kiley, Kyleigh.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).