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).
Scott is now well below its former popularity. All-time it's been given to 791,337 U.S. babies, the 1,029th most common name by sound today, peaking at 31,610 in 1971, with 567 in 2025.
By sound, Scott also includes the spellings Scot.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).