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).
Randy is now well below its former popularity. All-time it's been given to 368,283 U.S. babies, the 1,472nd most common name by sound today, peaking at 17,243 in 1956, with 232 in 2025.
By sound, Randy also includes the spellings Randi, Randee.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).