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).
Destiny is now well below its former popularity. All-time it's been given to 188,048 U.S. babies, the 806th most common name by sound today, peaking at 11,995 in 2000, with 545 in 2025.
By sound, Destiny also includes the spellings Destinee, Destini, Destiney, Destany.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).