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).
Harvey
Harvey has been climbing back after years of decline. All-time it's been given to 128,792 U.S. babies, the 586th most common name by sound today, peaking at 2,294 in 1921, with 1,400 in 2025.
Harvey has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).