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).
Orion climbed for decades and has been a steadily popular name ever since. All-time it's been given to 23,750 U.S. babies, the 651st most common name by sound today, peaking at 1,186 in 2018, with 1,030 in 2025.
Orion has no common alternate spellings by sound.
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).