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).
Lucille
Lucille was more common in the past and has since settled at a lower, steady level. All-time it's been given to 268,304 U.S. babies, the 584th most common name by sound today, peaking at 9,377 in 1918, with 1,340 in 2025.
By sound, Lucille also includes the spellings Lucile.
Rising