How to read the band →
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).
Autumn
Autumn was more common in the past and has since settled at a lower, steady level. All-time it's been given to 149,637 U.S. babies, the 242nd most common name by sound today, peaking at 4,360 in 1998, with 2,825 in 2025.
By sound, Autumn also includes the spellings Autum.
Rising