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).
Daisy has been climbing back after years of decline. All-time it's been given to 162,462 U.S. babies, the 268th most common name by sound today, peaking at 3,241 in 2025, with 3,241 in 2025.
By sound, Daisy also includes the spellings Deisy.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).