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).
Victoria has dropped sharply from its peak but is still widely used. All-time it's been given to 531,850 U.S. babies, the 158th most common name by sound today, peaking at 12,997 in 1993, with 4,086 in 2025.
By sound, Victoria also includes the spellings Viktoria.