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).
Beverly was more common in the past and has since settled at a lower, steady level. All-time it's been given to 398,959 U.S. babies, the 1,608th most common name by sound today, peaking at 11,720 in 1947, with 266 in 2025.
By sound, Beverly also includes the spellings Beverley, Beverlee.