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).
Rosemary
Rosemary has been climbing back after years of decline. All-time it's been given to 163,523 U.S. babies, the 641st most common name by sound today, peaking at 4,542 in 1947, with 1,222 in 2025.
Rosemary has no common alternate spellings by sound. Spellings sometimes heard the same way: Rosemarie.
Rising
Source: U.S. Social Security Administration, “National data” baby-names files (1880–2025).