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).
Dennis
Dennis was more common in the past and has since settled at a lower, steady level. All-time it's been given to 645,298 U.S. babies, the 1,050th most common name by sound today, peaking at 25,230 in 1952, with 482 in 2025.
By sound, Dennis also includes the spellings Denis.
Rising