How to read the band →
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).
Peggy
Peggy was a common American name in the 1950s but is rarely given today. It's been given to 300,918 U.S. babies all time and once ranked 345th by sound, peaking at 10,273 in 1958 (down to 12 in 2025).
By sound, Peggy also includes the spellings Peggie.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).