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).
Annie
Annie has been climbing back after years of decline. All-time it's been given to 362,180 U.S. babies, the 485th most common name by sound today, peaking at 7,513 in 1922, with 1,690 in 2025.
Annie has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).