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).
John
John is down from its peak but still widely used. All-time it's been given to 5,378,801 U.S. babies, the 40th most common name by sound today, peaking at 90,861 in 1947, with 8,523 in 2025.
By sound, John also includes the spellings Jon, Gian.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).