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).
Cheyenne has been slowly declining from its former popularity. All-time it's been given to 113,780 U.S. babies, the 970th most common name by sound today, peaking at 7,087 in 1996, with 444 in 2025.
By sound, Cheyenne also includes the spellings Cheyanne, Shyanne, Shyann, Shianne, Chyanne, Shayan.