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).
Melvin
Melvin is now well below its former popularity. All-time it's been given to 251,445 U.S. babies, the 1,465th most common name by sound today, peaking at 4,497 in 1942, with 243 in 2025.
By sound, Melvin also includes the spellings Melvyn.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).