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).
Courtney
Courtney has been slowly declining from its former popularity. All-time it's been given to 322,042 U.S. babies, the 1,751st most common name by sound today, peaking at 18,456 in 1990, with 163 in 2025.
By sound, Courtney also includes the spellings Cortney, Kourtney, Kortney.
Rising