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).
Braxton has been slowly declining from its former popularity. All-time it's been given to 69,100 U.S. babies, the 337th most common name by sound today, peaking at 3,530 in 2017, with 2,225 in 2025.
By sound, Braxton also includes the spellings Braxtyn.