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).
Augustus
Augustus has been climbing in recent years. All-time it's been given to 21,690 U.S. babies, the 843rd most common name by sound today, peaking at 791 in 2024, with 783 in 2025.
Augustus has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).