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).
Audrey is down from its peak but still widely used. All-time it's been given to 321,172 U.S. babies, the 231st most common name by sound today, peaking at 5,954 in 2013, with 2,983 in 2025.
By sound, Audrey also includes the spellings Audry, Audrie, Audree.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).