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).
Maggie
Maggie is now well below its former popularity. All-time it's been given to 123,360 U.S. babies, the 640th most common name by sound today, peaking at 1,874 in 2007, with 1,041 in 2025.
Maggie has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).