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).
Kinsley has been easing down from its peak but is still widely used. All-time it's been given to 69,987 U.S. babies, the 170th most common name by sound today, peaking at 5,596 in 2017, with 3,569 in 2025.
By sound, Kinsley also includes the spellings Kensley, Kinslee, Kinzley, Kinsleigh.