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).
Quinn
Quinn climbed for decades and has been a steadily popular name ever since. All-time it's been given to 89,495 U.S. babies, the 215th most common name by sound today, peaking at 4,698 in 2016, with 3,297 in 2025.
Quinn has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).