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).
Sutton has been climbing in recent years. All-time it's been given to 20,017 U.S. babies, the 343rd most common name by sound today, peaking at 2,715 in 2025, with 2,715 in 2025.
Sutton has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).