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).
Cyrus
Cyrus has been climbing in recent years. All-time it's been given to 29,286 U.S. babies, the 570th most common name by sound today, peaking at 1,400 in 2024, with 1,296 in 2025.
Cyrus has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).