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).
Olivia
Olivia has been easing down from its peak but is still widely used. All-time it's been given to 611,446 U.S. babies, the 4th most common name by sound today, peaking at 21,850 in 2014, with 14,330 in 2025.
By sound, Olivia also includes the spellings Alivia, Alyvia, Olyvia.
Rising