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).
Anthony has been easing down from its peak but is still widely used. All-time it's been given to 1,497,954 U.S. babies, the 91st most common name by sound today, peaking at 25,233 in 1990, with 5,977 in 2025.
By sound, Anthony also includes the spellings Anthoney. Spellings sometimes heard the same way: Antony.