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).
Odin has stayed fairly steady in American naming for generations. All-time it's been given to 13,282 U.S. babies, the 803rd most common name by sound today, peaking at 1,023 in 2022, with 604 in 2025.
Odin has no common alternate spellings by sound.