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).
Rosie
Rosie has been climbing in recent years. All-time it's been given to 86,026 U.S. babies, the 710th most common name by sound today, peaking at 1,581 in 1927, with 1,088 in 2025.
Rosie has no common alternate spellings by sound.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).