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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).
Aviana
Aviana has been slowly declining from its former popularity. All-time it's been given to 8,863 U.S. babies, the 1,293rd most common name by sound today, peaking at 845 in 2016, with 301 in 2025.
Aviana has no common alternate spellings by sound. Spellings sometimes heard the same way: Avianna.
Rising