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).
Gracelyn has been slowly declining from its former popularity. All-time it's been given to 29,185 U.S. babies, the 500th most common name by sound today, peaking at 2,007 in 2020, with 1,357 in 2025.
By sound, Gracelyn also includes the spellings Gracelynn.