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).
Everly was more common in the past and has since settled at a lower, steady level. All-time it's been given to 74,073 U.S. babies, the 99th most common name by sound today, peaking at 8,521 in 2020, with 5,045 in 2025.
By sound, Everly also includes the spellings Everleigh, Everlee, Everley.