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).
Athena
Athena has been climbing in recent years. All-time it's been given to 53,118 U.S. babies, the 266th most common name by sound today, peaking at 3,029 in 2022, with 2,477 in 2025.
Athena has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).