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).
Caroline
Caroline has been easing down from its peak but is still widely used. All-time it's been given to 258,168 U.S. babies, the 259th most common name by sound today, peaking at 5,140 in 2000, with 2,774 in 2025.
By sound, Caroline also includes the spellings Karoline, Carolyne.
Rising