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).
Sherry was a common American name in the 1960s but is rarely given today. It's been given to 496,875 U.S. babies all time and once ranked 173rd by sound, peaking at 23,823 in 1962 (down to 60 in 2025).
By sound, Sherry also includes the spellings Sherri, Sheri, Shari, Cheri, Sherrie, Sherie, Cherrie. Spellings sometimes heard the same way: Cherie, Cherri.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).