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 85,429 U.S. babies, the 501st most common name by sound today, peaking at 1,663 in 2011, with 1,469 in 2025.
By sound, Camille also includes the spellings Kamille, Kamil.