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).
Emmalyn is now well below its former popularity. All-time it's been given to 13,627 U.S. babies, the 1,198th most common name by sound today, peaking at 1,102 in 2015, with 343 in 2025.
By sound, Emmalyn also includes the spellings Emmalynn.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).