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).
Scotty has been climbing in recent years. All-time it's been given to 37,363 U.S. babies, the 522nd most common name by sound today, peaking at 2,649 in 2025, with 2,649 in 2025.
By sound, Scotty also includes the spellings Scottie.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).