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).
Jameson
Jameson has been easing down from its peak but is still widely used. All-time it's been given to 85,831 U.S. babies, the 197th most common name by sound today, peaking at 5,447 in 2019, with 2,966 in 2025.
By sound, Jameson also includes the spellings Jamison.
Rising