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).
Camille has stayed fairly steady in American naming for generations. All-time it's been given to 82,786 U.S. babies, the 516th most common name by sound today, peaking at 1,585 in 2011, with 1,429 in 2025.
By sound, Camille also includes the spellings Kamille.