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).
Roselyn
Roselyn has stayed fairly steady in American naming for generations. All-time it's been given to 17,541 U.S. babies, the 1,174th most common name by sound today, peaking at 630 in 2019, with 405 in 2025.
By sound, Roselyn also includes the spellings Roselynn.
Rising