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).
Paisley climbed for decades and has been a steadily popular name ever since. All-time it's been given to 80,279 U.S. babies, the 153rd most common name by sound today, peaking at 6,345 in 2015, with 4,174 in 2025.
By sound, Paisley also includes the spellings Paislee, Paisleigh.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).