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).
Madilyn
Madilyn climbed for decades and has been a steadily popular name ever since. All-time it's been given to 35,064 U.S. babies, the 576th most common name by sound today, peaking at 1,734 in 2014, with 977 in 2025.
By sound, Madilyn also includes the spellings Madilynn.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).