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).
Finn
Finn has climbed over the years and is holding near its high. All-time it's been given to 35,380 U.S. babies, the 405th most common name by sound today, peaking at 2,417 in 2017, with 1,717 in 2025.
Finn has no common alternate spellings by sound.
Rising