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).
Dorian
Dorian climbed for decades and has been a steadily popular name ever since. All-time it's been given to 28,728 U.S. babies, the 1,001st most common name by sound today, peaking at 703 in 2000, with 564 in 2025.
Dorian has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).