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).
James was more common in the past and has since settled at a lower, steady level. All-time it's been given to 5,277,087 U.S. babies, the 15th most common name by sound today, peaking at 95,024 in 1947, with 12,019 in 2025.
By sound, James also includes the spellings Jaymes.