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).
Henry has been climbing back after years of decline. All-time it's been given to 779,551 U.S. babies, the 17th most common name by sound today, peaking at 12,135 in 2025, with 12,135 in 2025.
By sound, Henry also includes the spellings Henri.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).