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).
Kinley has fallen well below its former popularity. All-time it's been given to 42,212 U.S. babies, the 645th most common name by sound today, peaking at 3,265 in 2012, with 884 in 2025.
By sound, Kinley also includes the spellings Kenley, Kynlee, Kinlee, Kenlee, Kenleigh.