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 climbed for decades and has been a steadily popular name ever since. All-time it's been given to 149,637 U.S. babies, the 238th 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
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).